A swarm of shallow (3-6 km depth) earthquakes including several felt ones (magnitudes 2.9-3.5) occurred yesterday and today under the SE flank near Zafferana town. So far, no other unusual signs of activity have been reported, but the swarm could indicate something in the making, and the monitoring agency INGV is certainly following these events closely.
Location of recent earthquakesSE of Lassen volcano (USGS data)
A shallow magnitude 5.7 earthquake occurred Fri, 24 May at 04:58 UTC km WNW of Greenville, California, about 50 km SE of Lassen volcano. Hundreds of aftershocks, some of them felt, have occurred. It is unlikely that the earthquake has any relation with the volcano. The status of Lassen volcano remains therefore at green.
The plume of Chirinkotan volcano this morning (NASA/MODIS via Blog Culture Volcan)
MODIS hot spot data (yesterday) for Pavlov volcano (ModVolc, Univ. Hawaii)
Chirinkotan (Northern Kuriles): The remote volcano in the northern Kuriles is probably in eruption, the latest SVERT report and satellite images suggest. A plume of gas and steam, and possibly some minor amounts ash was seen with the MODIS sensor onboard the NASA Terra satellite this morning. ...mehr
Satellite data also indicate that activity had likely already started in early May, because a small thermal anomaly can be traced back on archive pictures to 7 May. One should take into account that frequent dense cloud cover often prevents such observations, so activity could have started earlier than that. ... [read more] ... [show less] [less]
Powerful explosion yesterday at 02:54 local time (CENAPRED webcam)
Current seismic recording from Popocatépetl
Activity, both internal and external, remains elevated. A constant steam plume can be seen rising on webcams and a steam-gas-ash plume rises up to about 1.5 km above the volcano. The seismic signal shows frequent earthquakes and emission events. ...mehr
Yesterday, the volcano has been very active and produced frequent explosions and near-continuous steam-gas-ash emissions accompanied by phases of volcanic tremor. At 02:54 h local time, an explosion occurred, which sent huge fragments at distances of up to 1.5 km from the crater (image). After this event, activity continued unabated. A volcanic earthquake of magnitude 2.3 occurred at 12:08 h local time. [less]
The plume of Chirinkotan volcano this morning (NASA/MODIS via Blog Culture Volcan)
The remote volcano in the northern Kuriles is probably in eruption, the latest SVERT report and satellite images suggest. A plume of gas and steam, and possibly some minor amounts ash was seen with the MODIS sensor onboard the NASA Terra satellite this morning. ...mehr
Satellite data also indicate that activity had likely already started in early May, because a small thermal anomaly can be traced back on archive pictures to 7 May. One should take into account that frequent dense cloud cover often prevents such observations, so activity could have started earlier than that. It is not known what kind of activity is occurring at the volcano. Possibilities include some minor explosive (strombolian ?) activity at the summit, or lava flows that might be reaching the sea and produce the steam plume observed. [less]
Ash plume from Copahue seen from space (MODIS, via Blog Culture Volcan)
SERNAGEOMIN has raised the alert level to orange. Since May 15, a progressive increase in seismic activity as well emissions of gas and now some ash have been observed. ...mehr
Both earthquakes related to rock fracturing and fluid movements have picked up in numbers and possibly indicate a new magmatic intrusion on its way. This scenario is confirmed by the start of small ash emissions and glow at the crater which is visible at night. The plume of gas and ash could be seen from space by the MODIS sensor, streching about 100 km to the southeast. Copahue volcano had already experienced a first increase of activity in December, and a second one in January. No eruption followed and alert was lowered to green in April before returning to yellow again soon after. [less]
Seismic trace of the 3.5 earthquake today (ESVO station, INGV Catania)
Etna (Sicily, Italy): A shallow magnitude 3.5 earthquake occurred under the town of Zafferana, about 10 km east of the summit area this afternoon. ...mehr
The volcano has been quiet for some while now, but it could (and likely will) erupt again in the near future. Whether this earthquake is a harbinger of something new to come is impossible to say at the moment, but it's a good idea to keep a close watch of the volcano. ... [read more] ... [show less] [less]
Seismic trace of the 3.5 earthquake today (ESVO station, INGV Catania)
A shallow magnitude 3.5 earthquake occurred under the town of Zafferana, about 10 km east of the summit area this afternoon. ...mehr
The volcano has been quiet for some while now, but it could (and likely will) erupt again in the near future. Whether this earthquake is a harbinger of something new to come is impossible to say at the moment, but it's a good idea to keep a close watch of the volcano. More information about this earthquake. [less]
Strombolian eruption from the NE vent (21 May 2013)
Eruption plume from Pavlov on 21 May seen from space (NASA)
Stromboli (Eolian Islands, Italy): Explosive activity at Stromboli is currently at normal to moderately high levels, but the magma column has obviously dropped considerably compared to previous weeks, as there are no longer lava overflows. We observed the volcano during the past days and found a total of 8 active vents in the crater terrace, out of which 4 were showing their typical different strombolian activity: ...mehr
In the NW crater area, two adjacient vents often erupted simultaneously. One was ejecting dense jets of incandescent gas, almost no ash and only few incandescent tephra that formed candle-like fountains reaching 100-200 m height, and accompanied by loud jet-engine like noises. The other one erupted silent, dense low ash plumes and glowing material to 50-100 m. Eruptions occurred every 20-30 minutes on average. ... [read more] ... [show less] [less]
Strombolian eruption from the NE vent (21 May 2013)
Jet-like and simultaneous ash-rich eruption from two of the NW vents (21 May 2013)
Explosive activity at Stromboli is currently at normal to moderately high levels, but the magma column has obviously dropped considerably compared to previous weeks, as there are no longer lava overflows. We observed the volcano during the past days and found a total of 8 active vents in the crater terrace, out of which 4 were showing their typical different strombolian activity: ...mehr
In the NW crater area, two adjacient vents often erupted simultaneously. One was ejecting dense jets of incandescent gas, almost no ash and only few incandescent tephra that formed candle-like fountains reaching 100-200 m height, and accompanied by loud jet-engine like noises. The other one erupted silent, dense low ash plumes and glowing material to 50-100 m. Eruptions occurred every 20-30 minutes on average. Two vents in the central crater area were constantly glowing and ejecting pulsating steam puffs, but did not erupt. [less]
Activity has been showing an increase today. Yesterday, CENPRED reported near-continuous emissions of steam and gas and sometimes ash. Some larger explosions occurred at 12:13 h and at 12:34 h local time yesterday. Both produced an eruption column about 1.3 km high and drifting west. Bright glow and strong steaming are currently visible from the webcam images. ...mehr
A total of 3 hours of spasmodic tremor of low to medium amplitude were recorded yesterday. In addition there were two volcanotectonic earthquakes, one at 13:09 h of magnitude 2.1 and another at 15:55 h of magnitude 1.8 (local times). [less]
Ash emissions from Turrialba volcano (OVSICORI webcam)
Turrialba (Costa Rica): New ash emissions occurred yesterday and produced light ash falls in the outskirts of San José, in the areas of Guadalupe, Tres Ríos, Curridabat, and Ipis (at about 30 km distance). ...mehr
The relatively strong ash emissions occurred from about 08:50 until 10h30 local time and were produced from two vents at the volcano. At the moment, it is not yet clear whether some of the ash is from new magma or if it is only pulverized older rock (i.e. the product of phreatic activity). Analysis of ash samples will probably tell this very soon. The volcano has in the recent past occasionally emitted ash, such as last in Jan 2012, but had otherwise only been in a state of strong degassing recently. It is known for high SO2 emissions that damage vegetation around the crater and at nearby plantations.
Ash emissions from Turrialba volcano (OVSICORI webcam)
New ash emissions occurred yesterday and produced light ash falls in the outskirts of San José, in the areas of Guadalupe, Tres Ríos, Curridabat, and Ipis (at about 30 km distance). ...mehr
The relatively strong ash emissions occurred from about 08:50 until 10h30 local time and were produced from two vents at the volcano. At the moment, it is not yet clear whether some of the ash is from new magma or if it is only pulverized older rock (i.e. the product of phreatic activity). Analysis of ash samples will probably tell this very soon. The volcano has in the recent past occasionally emitted ash, such as last in Jan 2012, but had otherwise only been in a state of strong degassing recently. It is known for high SO2 emissions that damage vegetation around the crater and at nearby plantations. [less]
Sangeang Api (Indonesia): An increase in seismicity since 26 April triggered VSI to rise the alert status from 2 to 3 on a scale of 1-4 (from "Waspada", "watch" to Siaga", alert). For the moment, only degassing has been observed as surface activity. ...mehr
A similar increase in seismic activity was observed in Oct 2012, when the alert was raised as well and then reduced again in November. [less]
An increase in seismicity since 26 April triggered VSI to rise the alert status from 2 to 3 on a scale of 1-4 (from "Waspada", "watch" to Siaga", alert). For the moment, only degassing has been observed as surface activity. ...mehr
A similar increase in seismic activity was observed in Oct 2012, when the alert was raised as well and then reduced again in November. [less]
Thermal image of the crater area of Stromboli (INGV Catania)
Stromboli (Eolian Islands, Italy): Over the past days, Stromboli has returned to normal levels of activity with frequent, mostly small to medium-sized explosions and low to medium tremor. Small lava overflows and frequent rockfalls still occur. ...mehr
Pavlov (Alaska Peninsula, USA): The eruption continues with no significant changes. Small lava fountaining, explosions, and the explosive interaction of the lava flow with snow and ice generate a plume of steam, ash, and gas, occasionally reaching up to 22,000 ft. above sea level, and extending primarily southeast from the volcano over the North Pacific Ocean visible in satellite images. [less]
Pavlof volcano eruption column, May 18, 2013. Photo courtesy Theo Chesley. (AVO)
Aerial view of the lava dome in Popo's crater on 18 May (CENAPRED)
Kizimen (Kamchatka): The lava dome remains active and produces hot avalanches on the western and eastern flanks. KVERT reports moderate seismic activity, incandescence of the volcano summit and medium to strong degassing. ...mehr
Shiveluch (Kamchatka): The activity of the growing lava dome continues with little changes. KVERT reports moderate seismic activity, moderate gas-steam activity and incandescence. [less]
Pavlof volcano eruption column, May 18, 2013. Photo courtesy Theo Chesley. (AVO)
The eruption continues with lava fountaining, an active lava flow and ash emissions, accompanied by continuous seismic tremor. Aerial observations suggest that the interaction of lava and ice on the upper slope of the volcano create mud flows and pyroclastic flows. ...mehr
A narrow plume of steam, ash, and gas, occasionally up to 20,000 ft. above sea level, and extending southeast from the volcano over the North Pacific Ocean was visible in satellite images yesterday. Minor to trace ash fallout could be occurring on the north, east and southeast flanks of the volcano and possibly on parts of Pavlof Bay and adjacent waters southeast of the volcano. Nearby communities have not reported any ash fall over the past 24 hours. (AVO) [less]
Aerial view of the lava dome in Popo's crater on 18 May (CENAPRED)
Activity remains elevated, but the number and size of explosions have decreased during the past 2 days. CENAPRED made an overflight and found that the series of recent explosions since 14 May, in particular the two that occurred on the night of the 16th to 17th, have excavated a crater of approx. 200 m diameter and 40 m depth in the lava dome. The rest of the dome's surface is covered by fragments from the explosions.
MODIS hot spot data (past 7 days) for Pavlov volcano (ModVolc, Univ. Hawaii)
Eruption from Popo this morning (CENAPRED webcam)
Sakurajima (Kyushu, Japan): It seems that the latest cycle of increased activity has ended: after several days of intense activity, culminating in larger explosions on 14 and 15 May, the volcano has been "taking a rest" lasting about 2 days. This morning, only a small explosion was recorded. ...mehr
Pavlov (Alaska Peninsula, USA): The eruption continues with lava fountaining at the summit that feeds a lava flow now over 100 m long and produces a continuous ash, steam, and gas plume extending downwind from the volcano for 50 to 100 km at an altitude of about 20,000 ft above sea level. This morning the cloud was carried to the southeast. Satellite images show persistent elevated surface temperatures at the summit and on the northwest flank. [less]
View of Pavlof, May 14, 2013. Photo courtesy of pilot Theo Chesley. (AVO)
Moderate explosion at Popocatépetl this morning
Pavlov (Alaska Peninsula, USA): The eruption continues. The volcano produces a lava flow on the northwest flank. Interaction of the lava flow and ice, producing debris flows, as well as possible explosions at the vent produce a steam-ash plume rising up to about 20,000 ft. above sea level. ...mehr
Residents of Cold Bay, located 37 miles southwest of the volcano, observed incandescent glow at the summit during the night. (AVO) [less]
View of Pavlof, May 14, 2013. Photo courtesy of pilot Theo Chesley. (AVO)
The eruption continues. The volcano produces a lava flow on the northwest flank. Interaction of the lava flow and ice, producing debris flows, as well as possible explosions at the vent produce a steam-ash plume rising up to about 20,000 ft. above sea level. ...mehr
Residents of Cold Bay, located 37 miles southwest of the volcano, observed incandescent glow at the summit during the night. (AVO) [less]
Current seismic recording at Tungurahua (RETU station, IGPEN)
The volcano has calmed down a bit compared to the previous week, which is also apparent on recent seismograms. No recent explosions or ash falls were reported.
Strombolian activity has returned or increased and is now ejecting incandescent material to heights of 100 m. Seismic data seem currently not available from INSIVUMEH's website.
Relatively strong explosions occurred last night (at 20:21 h local time 14 May) and this morning at 01:46 h (local time). Both eruptions generated columns of steam and ash rising 3 km and the latter explosion ejected incandescent fragments over all the volcano flanks to maximum distances of 1,500 m. ...mehr
Some episodes of harmonic tremor preceded the explosion at 01:46 h, which was followed by an episode of spasmodic tremor of medium and high amplitudes until 04:40 h. Later, other 30 minutes of this type of tremor of lesser energy were registered. The tremor episode were accompanied by the emission of incandescent fragments to maximum distances of 500 m on the north and northeast flanks. [less]
Seismic signal from Stromboli this morning (STR8 station, INGV)
Webcam image of Shiveluch (KVERT) showing weak glow and a steam/ash plume rising from the dome
Stromboli (Eolian Islands, Italy): Activity has remained generally elevated and seems to have increased yesterday. Current seismic recordings show strong explosion signals and an increase in tremor. A small lava overflow is currently visible from the NE crater. ...mehr
Shiveluch (Kamchatka): Lava dome growth continues. This morning, an explosion and/or a partial collapse produced a volcanic ash cloud rising to 15,000 ft (4.7 km) altitude this morning by VAAC Tokyo. [less]
Seismic signal from Stromboli this morning (STR8 station, INGV)
Current thermal image of the crater area of Stromboli (INGV)
Activity has remained generally elevated and seems to have increased yesterday. Current seismic recordings show strong explosion signals and an increase in tremor. A small lava overflow is currently visible from the NE crater.
Webcam image of Shiveluch (KVERT) showing weak glow and a steam/ash plume rising from the dome
Lava dome growth continues. This morning, an explosion and/or a partial collapse produced a volcanic ash cloud rising to 15,000 ft (4.7 km) altitude this morning by VAAC Tokyo. ...mehr
KVERT reports no changes in activity for the other 5 currently active volcanoes in Kamchatka (continuing lava effusion at Tolbachik, dome growth at Kizimen and Bezymianny, intermittent mild explosions at Karymsky, strong degassing at Gorely). [less]
Aerial view of the growing lava dome in Popo's crater (CENAPRED)
Current view of Popo from the south
Activity remains elevated as new magma continues to rise to the summit at increased rate. The volcano produces intense steaming and occasional explosions that generate steam and ash plumes up to 3 km height and throw incandescent blocks to distances of 700 m. Phases of moderate continuous tremor and several volcano-tectonic earthquakes up to magnitudes 2 accompany this process. Authorities are starting preparations for evacuations should it further increase. ...mehr
CENAPRED made an aerial survey flight yesterday morning and observed that the lava dome has grown significantly and is now 350 m in diameter and 50 m thick. After an explosion at 9:56 (local time 14 May), it could be seen that the dome had slightly deflated, although it did not diminish considerably in volume. This event might represent the beginning of the dome´s destruction. [less]
MODIS hot spot data (past 2 days) for Pavlov volcano (ModVolc, Univ. Hawaii)
Current seismic recording from Popocatépetl
Sakurajima (Kyushu, Japan): Explosive activity has picked up again at the volcano. Today alone, several explosions have occurred, two of which of moderately large size with ash plumes reaching 10,000 and 12,000 ft (3 and 3.7 km) altitude. (VAAC Tokyo) ...mehr
Pavlov (Alaska Peninsula, USA): Seismic activity has decreased today, but remains elevated. MODIS data confirm a hot spot at the summit, which could suggest a small lava flow there. [less]
Explosive activity has picked up again at the volcano. Today alone, several explosions have occurred, two of which of moderately large size with ash plumes reaching 10,000 and 12,000 ft (3 and 3.7 km) altitude. (VAAC Tokyo)
Ground deformation (deflation) at Sabancaya volcano measured by InSAR (IGP)
Location of recent earthquakes (IGP)
The possible ash emissions on 9 May have not been confirmed, but unrest in the form of increased earthquake activity and ground deformation has increased since early May, the Geophysical Institute of Peru (IGP) reported in its press release on 10 May. ...mehr
So-called "hybrid" earthquakes (related to both the fracturing of rock and fluid movements) have increased since 2 May, while purely volcanic-tectonic quakes have remained stable. Satellite-born InSAR radar measurements showed that the area of the current seismicity (north-east of the volcano, just above the village of Hornillo), has shown subsidence of about 7 cm, which is possibly related to magma draining from there into different reservoirs. [less]
A new eruption has probably started. AVO raised the alert level to orange, following an increase in seismic activity this morning along with the presence of an intense thermal anomaly at the summit observed in latest satellite imagery. ...mehr
Similar patterns of seismicity and elevated surface temperatures have previously signalled the onset of eruptive activity at Pavlof. Although not yet visually confirmed, a low-level eruption of lava has likely begun from a summit vent. No ash clouds have been detected. Source: AVO [less]
MODIS hot spot data (past 2 days) for Tolbachik volcano (ModVolc, Univ. Hawaii)
Current seismic recording from Popocatépetl
Kizimen (Kamchatka): Activity continues with little changes. Video data showed that the lava dome is still active and produces incandescence and hot avalanches on the western and eastern flanks. Strong and moderate gas-steam activity accompany this process. Satellite data showed a thermal anomaly over the volcano. (KVERT) ...mehr
Tolbachik (Kamchatka): Although tremor continues to decrease very slowly, KVERT reports that fluid lava is still being erupted from the vent on the southern fissure. MODIS satellite data still show a large hot spot, confirming that the eruption might be longer lasting than thought. [less]
Seismic recording this morning at Nevado del Ruiz (OLL station, INGEOMINAS)
A small seismic swarm, likely caused by the rise of another new small batch of magma, occurred this morning at the volcano. The hyopcenters were located 4 km SW of the Arenas crater at depths between 4-6 km, INGEOMINAS reported.
Map of earthquakes on the submarine Reykjanes Ridge during 9-10 May
Depth vs time of earthquakes during 9-10 May
An earthquake swarm with hundreds of earthquakes up to magnitudes near 4 occurred between 9-10 May at about 10 km depth on the submarine prolongation of the SW rift zone (Reykjanes Ridge). Likely, it was caused by a shallow magmatic intrusion, but there are no reports suggesting a submarine eruption.
Current seismic recording at Tungurahua (RETU station, IGPEN)
Popocatépetl (Central Mexico): The activity continued to increase over the past days and CENAPRED raised the alert level to Yellow Phase 3 this morning. The volcano has been producing frequent sequences of continuous steam and ash emissions as well as discrete vulcanian-type explosions that throw glowing bombs to several hundred meters distance from the crater and create ash plumes up to about 2 km high. ...mehr
A phase of strong volcanic tremor occurred today and a large SO2 plume visible on NOAA satellite data accompanies increase lava output rate. [less]
SERNAGEOMIN has recently raised the alert back to yellow after new small explosions occurred at the volcano and incandescence was observed at the summit crater. A small but persistent steam-and-ash plume has been rising about 350 m from the volcano. Interestingly, little change in the seismic activity has been noticed with the incandescence and explosions, so it is not clear whether this new activity is caused by fresh magma rising towards the surface.
Possible eruptions have started at the volcano. Pilots reported several volcanic ash plumes from the volcano in the past days although VAAC Buenos Aires could not identify ash on satellite imagery.
The activity continued to increase over the past days and CENAPRED raised the alert level to Yellow Phase 3 this morning. The volcano has been producing frequent sequences of continuous steam and ash emissions as well as discrete vulcanian-type explosions that throw glowing bombs to several hundred meters distance from the crater and create ash plumes up to about 2 km high. ...mehr
A phase of strong volcanic tremor occurred today and a large SO2 plume visible on NOAA satellite data accompanies increase lava output rate. [less]
Popocatépetl (Central Mexico): On 9 May, 28 explosions were noted from the volcano, the largest were at 05:16 and 07:01 am. Incandescence was seen at night. Several periods of harmonic tremor were noted in the reporting period. A gas and steam plume drifted SE. ...mehr
Popocatépetl (Central Mexico): A significant increase in activity occurred at the volcano. Starting at 19:28 h local time yesterday, volcanic tremor of high amplitude has been recorded for 3.5 hours and accompanied by strong steam and ash emissions creating an eruption column rising 3 km. Explosions ejected incandescent fragments to distances of 700 m from the crater. ...mehr
The eruption plume drifted ESE and caused ash fall in areas of the villages of San Juan Tianguismanalco, San Pedro Benito Juárez and the City of Puebla. It is possible that more ash fall will be reported from other villages in the east, south-east (Atlixco) and south (Tochimilco).
A significant increase in activity occurred at the volcano. Starting at 19:28 h local time yesterday, volcanic tremor of high amplitude has been recorded for 3.5 hours and accompanied by strong steam and ash emissions creating an eruption column rising 3 km. Explosions ejected incandescent fragments to distances of 700 m from the crater. ...mehr
The eruption plume drifted ESE and caused ash fall in areas of the villages of San Juan Tianguismanalco, San Pedro Benito Juárez and the City of Puebla. It is possible that more ash fall will be reported from other villages in the east, south-east (Atlixco) and south (Tochimilco). [less]
It contains a reviewed summary of volcano activity during the past month, plus the new Volcano Express section with interesting articles on Machin and Chaiten volcanoes and a review of the pubvolc website. [less]
Mayon (Luzon Island): A sudden (probably phreatic) powerful eruption from the summit crater occurred this morning and killed at least 5 people in camp #2 and wounded 15 others. ...mehr
The victims, many foreigners, were part of an organized group of climbers. They were surprised by the explosion that showered the camp area with ballistic blocks that hit them. ... [read more] ... [show less] [less]
A sudden (probably phreatic) powerful eruption from the summit crater occurred this morning and killed at least 5 people in camp #2 and wounded 15 others. ...mehr
The victims, many foreigners, were part of an organized group of climbers. They were surprised by the explosion that showered the camp area with ballistic blocks that hit them. The eruption itself produced a large ash-plume rising several hundred meters before dispersing. [less]
MODIS hot spot data for Paluweh island, showing the hot pyroclastic deposits S, E and W of the dome (MODIS, Univ. Hawaii)
Eruption plume from Cleveland yesterday (AVO / USGS)
Bagana (Bougainville Island, Papua New Guinea): Eruptions have intensified at the volcano. Over the past 2 days, several explosions produced ash plumes rising to about 7,000 ft (2.1 km) altitude and drifting 30-45 nautical miles to the W and NW (VAAC Darwin). ...mehr
Increased seismic activity was detected at the volcano and VSI raised the alert level to 3 out of 4 ("Siaga", "warning") yesterday. ...mehr
Sudden phreatic explosions could occur with little warning at the volcano and present a significant hazard to visitors to the crater, which is a popular tourist site due to its varied, intense hydrothermal activity and colorful active fumaroles. [less]
Another explosion occurred yesterday evening. It was heard in up to 6 km distance and incandescent bombs were ejected to 200 m distance from the Tompaluan crater. ...mehr
The eruption was preceded by an increase in seismic activity starting Saturday night, the local volcano observatory reported. An exclusion zone of 2.5 km radius from the volcano remains in place. [less]
Seismic recording this morning at Nevado del Ruiz (OLL station, INGEOMINAS)
After a short pause, a new seismic swarm, possibly indicating yet another pulse of magma intrusion, started yesterday at the volcano. The largest quake was a magnitude 2.9 event at 19:28 local time at 5.4 km depth beneath the Arenas crater. It was felt around the volcano.
Eruption plume from Cleveland yesterday (AVO / USGS)
After the initial explosion 2 days ago, continuous small eruptions produced a steam and ash plume yesterday and decreased in intensity again today. The activity of the volcano, which is not monitored on ground, was detected by satellite data and infrasonic tremor measured by ground-coupled airwaves on the nearby Okmok seismic network, 120 km (80 mi) to the northeast. ...mehr
A faint plume extended eastward below 15,000 ft. Satellite data also continue to show highly elevated surface temperatures at the summit. Sudden explosions of blocks and ash are possible with little or no warning. Ash clouds, if produced, could exceed 20,000 feet above sea level. [less]
MODIS hot spot data for Paluweh island, showing the hot pyroclastic deposits S, E and W of the dome (MODIS, Univ. Hawaii)
The lava dome remains relatively active and produces frequent explosions and/or hot rock avalanches. Hot deposits from these can be seen on MODIS satellite data on the eastern, southern and western flank of the dome. Several ash plumes rising to altitudes of about 7,000 ft (2.1 km) were detected in the past days.
Eruptions have intensified at the volcano. Over the past 2 days, several explosions produced ash plumes rising to about 7,000 ft (2.1 km) altitude and drifting 30-45 nautical miles to the W and NW (VAAC Darwin).
The mighty crater of Marum crater, Ambrym Island, Vanuatu. Very steep crater walls requires steady carefullness. The lava lake of apprx. 40m in diameter in a depht of apprx. 250-300m.
Cleveland (Aleutian Islands, Alaska): A possible explosion occurred this morning at the volcano at 5:00AM AKDT (13:00 UTC) by AVO infrasound recorders. The infrasound signals suggest that this was a relatively short duration, low-level explosion. No eruption cloud has been detected in available satellite views. AVO received no other reports of activity. (USGS / AVO) ...mehr
A possible explosion occurred this morning at the volcano at 5:00AM AKDT (13:00 UTC) by AVO infrasound recorders. The infrasound signals suggest that this was a relatively short duration, low-level explosion. No eruption cloud has been detected in available satellite views. AVO received no other reports of activity. (USGS / AVO)
Seismic signal from Ruiz this morning (OLL station, INGEOMINAS)
Sakurajima (Kyushu, Japan): Since 1 May, activity has been increasing again from relatively low levels during the weeks before. Over the past 3 days, several explosions have produced ash plumes rising to 10,000 ft (3 km) altitude and on most days, there have been 3-4 daily explosions (for Sakurajima, this is a large number). ...mehr
Popocatépetl (Central Mexico): Some small earthquake swarms have occurred at the volcano in the past days, probably associated with some batches of fresh magma intruding into the system at shallow depth. [less]
Thermal webcam image of the crater area of Stromboli (INGV)
Tremor signal (ESLN station, INGV)
Stromboli (Eolian Islands, Italy): Lava continues to intermittently flow over and out of vents at the rim and the base of the NE crater. Yesterday, the active flow front had reached about half way down the Sciara, local guides reported. ...mehr
Today, tremor has decreased again a bit, but overflows remain active at least in the upper parts of the slope. Relatively large explosions and near-constant rockfalls on the Sciara continue during the whole time. [less]
An unusually large SO2 plume from Dukono suggests the volcano, in semi-permanent strombolian-type eruption for many years, is currently in a phase of elevated activity.
NASA Earth Observatory image of Hear Island on 20 April 2013 by Jesse Allen and Robert Simmon
Effusive eruptive activity at the remote volcano continues. A recent satellite picture shows a new lava flow on the SW flank of Mawson Peak. A MODIS hot spot is visible as well. ...mehr
Starting in October 2012, satellites measured subtle signals that suggested volcanic activity on remote Heard Island. The recent satellite images (NASA Earth Observatory) have now provided proof of an eruption otherwise likely undetected. By April 7, 2013, Mawson’s steep-walled summit crater had filled, and a trickle of lava had spilled down the volcano’s southwestern flank. On April 20 the lava flow remained visible, and had even widened slightly just below the summit. [less]
Thermal webcam image of the crater area of Stromboli (INGV)
Webcam image of the crater area of Stromboli (INGV)
Lava continues to intermittently flow over and out of vents at the rim and the base of the NE crater. Yesterday, the active flow front had reached about half way down the Sciara, local guides reported. ...mehr
Today, tremor has decreased again a bit, but overflows remain active at least in the upper parts of the slope. Relatively large explosions and near-constant rockfalls on the Sciara continue during the whole time. [less]
Lava overflow on the Sciara del Fuoco (INGV thermal webcam)
Current seismogram from Telica volcano (TELN station INETER)
Stromboli (Eolian Islands, Italy): After decreasing a bit yesterday, the overflow of lava from the NE vents has gained in strength this morning again, accompanied by constant rockfalls, relatively strong explosions and higher tremor. ...mehr
Tolbachik (Kamchatka): KVER reports no change in the ongoing eruption of the volcano and ongoing high tremor values at levels similar to the past weeks. Recent field reports however suggest that the eruption continues its slowly declining trend and might actually be ending soon. [less]
KVER reports no change in the ongoing eruption of the volcano and ongoing high tremor values at levels similar to the past weeks. Recent field reports however suggest that the eruption continues its slowly declining trend and might actually be ending soon. ...mehr
A group who visited the volcano on 29 April could not see lava flows or explosions at the active cone on the southern fissure. It was even possible to walk on the now cooling lava flows. However, weak incandescence and a MODIS hot spot remain visible. It is likely that the still elevated tremor signal indicates that the magma continues to be fed into lava tubes and emerges in places that are difficult to see or access. Although it would not come at all as a surprise if the eruption ends, after almost half a year, it is certainly still too early to announce its end right now. [less]
Current seismic recording from Nevado del Ruiz (OLL station, INGEOMINAS)
Last night's seismic recording from Nevado del Ruiz (OLL station, INGEOMINAS)
A shallow (5 km depth) earthquake of magnitude 3.8 occurred yesterday at 10:24 local time north of the Arenas crater and has been followed by an ongoing earthquake swarm. ...mehr
The quake was felt in nearby areas including Manizales and Villamaria. Possibly, this could mean a new magmatic intrusion, but so far no reports of increased surface activity have become known. [less]
Lava overflow on the Sciara del Fuoco (INGV thermal webcam)
Visual webcam image of the crater area (INGV)
After decreasing a bit yesterday, the overflow of lava from the NE vents has gained in strength this morning again, accompanied by constant rockfalls, relatively strong explosions and higher tremor.
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