Why can we not find (anywhere on the web) current volcano information any newer than July 8, 2012????
Posted By: Thom Harvill on May 19, 2012 05:36AM
Fuego in Antigua Guatemala
I just came in the house from watching Fuego erupt for two hours and a half. There is a huge river of lava and as i speak it is still erupting. I have lived here for one and a half years and this is the most activity at one condensed time i have had the pleasure to see. Again this is Fuego volcano in Antigua Guartemala and it is exciting here tonight.
INGV in its latest report suggests that the shallow magma reservoir 1-2 km under the volcano feeding the recent eruptions has temporarily been exhausted. This would mean that the paroxysms should become less frequent and weaker if not stop at all for the time being.
The really BIG question is when the next flank eruption will be...
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. ...more
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. [më pak]
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.
Seismic recording from Telica this morning (TELN station, INETER)
Seismic recording from Telica 15 May (TELN station, INETER)
Seismic activity has returned (for now) to relatively low levels today. This follows many small earthquake swarms that occurred during the past week. [Lexoni të gjitha]
Activity remains intense. Last night at 22:14 and this morning at 00:29 h local time, two strong explosions occurred and ejected incandescent fragments on all the volcano´s flanks to distances of up to 1,500 m from the crater. The explosions triggered an eruption plume rising at least 3 km above the volcano, drifting northeast.
MODIS hot spot data (past 7 days) for Pavlov volcano (ModVolc, Univ. Hawaii)
Current seismic recording from Pavlov volcano (PVV station, AVO)
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. ...more
Seismic activity remains elevated with nearly continuous tremor recorded on the seismic network. [më pak]
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. ...more
Residents of Cold Bay, located 37 miles southwest of the volcano, observed incandescent glow at the summit during the night. (AVO) [më pak]
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. ...more
Residents of Cold Bay, located 37 miles southwest of the volcano, observed incandescent glow at the summit during the night. (AVO) [më pak]
Activity remains elevated and ash plumes from frequent explosions of moderate size reach 26,000 ft (8 km) altitude, drifting NE. Ash fall occurred in Paso de Cortés, north of the volcano. ...more
This morning, many explosions were observed ejecting incandescent material to maximum distances of 400 m mainly on the north and north-east flanks. Several pulses of high frequency tremor of low amplitude accompanied the emissions. [më pak]
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.
Only relatively few and weak explosions occurred recently, some of which caused light ash fall in nearby areas. The lava dome is producing a degassing plume most of the time. No reports of activity at the stagnant lava flows.
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.
Pasto volcano observatory reports no significant changes and maintains yellow (unrest) alert level. The only sign of activity is continuing slightly elevated seismicity (up to magnitudes 1) at shallow depths (less than 3 km) under La Plazuela crater on the northern flank of the volcanic complex.
Internal / external activity has been low with weak earthquake activity (although at somewhat increasing tendency) and steaming observed. Pasto reports low values of SO2 emissions.
No changes have occurred - the only signs of activity are small earthquakes, mostly related to rock fracturing inside the volcano SE of the main dome. The alert status remains at yellow.
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. ...more
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. [më pak]
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. ...more
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. [më pak]
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. ...more
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). [më pak]
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. ...more
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. [më pak]
A new steaming lava flow at Pavlof seen by a airline pilot. Photo taken at around 7 pm, May 13.
A small gas and ash? plume from Pavolf on May 14.
Eruptive activity on 13 May at Pavlof has been confirmed. Pilot images have shown a new spatter fed lava flow extending 500 m down the N flank of the volcano. ...more
Small steam and ash eruptions were noted from Cold Bay. [më pak]
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) ...more
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. [më pak]
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)
IGPEN reports ongoing strombolian activity with lava ejected to 200 m above the crater, continuing emissions of steam and ash and occasional strong explosions with roaring sounds that produce ash columns up to 3 km high. Ashfall was reported overnight 12-13 May in the sector of Manzano.
Activity has been generally low recently, with infrequent small explosions and occasional small avalanches produced from the weakly active lava flows on the dome's flanks.
Activity has remained stable and at relatively low levels over the past days. The volcano has few weak to moderate strombolian-type explosions every now and then (5-10 per day), which produce small ash plumes rising up to 5-700 m above the crater.
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. ...more
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. [më pak]
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. ...more
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 [më pak]
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) ...more
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. [më pak]
MODIS hot spot data (past 2 days) for Tolbachik volcano (ModVolc, Univ. Hawaii)
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.
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)
The lava dome continues to be active and produce explosions and small pyroclastic flows from time to time, generating ash plumes rising to 7-10,000 ft such as today.
Activity at the volcano continues to increase. A relatively long phase of strong volcanic tremor today and high levels of SO2 output suggests that the rise of magma is accelerating. A continuous plume of steam and some ash was observed last night reaching 1 km high, in addition to intermittent explosions. Lava glow at night is now strong.
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. ...more
A phase of strong volcanic tremor occurred today and a large SO2 plume visible on NOAA satellite data accompanies increase lava output rate. [më pak]
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.
Current seismic recording at Tungurahua (RETU station, IGPEN)
Seismic and surface activity remain moderate with ash emissions and intermittent strong strombolian to vulcanian explosions which sometimes are accompanied by ground vibration and strong shock waves that rattle windows and doors in nearby areas. ...more
An explosion on Friday produced and ash plume rising up to 30,000 ft (9 km) elevation. Ash falls have been occurring in areas of Santa Fe de Galán, Mocha, Sabañag, Tisaleo and Quero. [më pak]
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. ...more
A phase of strong volcanic tremor occurred today and a large SO2 plume visible on NOAA satellite data accompanies increase lava output rate. [më pak]
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. ...more
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.
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. ...more
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. ...more
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). [më pak]
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. [më pak]
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. ...more
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] [më pak]
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. ...more
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. [më pak]
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). ...more
Increased seismic activity was detected at the volcano and VSI raised the alert level to 3 out of 4 ("Siaga", "warning") yesterday. ...more
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. [më pak]
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. ...more
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. [më pak]
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. ...more
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. [më pak]
MODIS hot spot data (past 2 days) for Reventador volcano (ModVolc, Univ. Hawaii)
Activity has remained moderate with occasional explosions and possibly the emplacement of a hot avalanche or lava flow on the eastern flank, where a new hot spot on the latest MODIS satellite data can be seen, in addition to the summit where a lava dome is active.
No changes occurred in the volcano's slow effusive/explosive activity. Emissions of steam and gas, with minor ash contents, have been at rates of less than 1 per hour during the previous days, but continuing lava glow can be seen from the summit.
SO2 plume from Tungurahua volcano yesterday (NOAA)
A gradual increase in eruptive activity is evident. Near continuous ash and steam emissions are interrupted by cannon-like explosions that produce ash plumes rising up to 2-3 km height and produce light ash falls in the areas around the volcano. At night, strombolian activity can be seen from the summit. ...more
A significant SO2 plume can be seen on satellite data drifting to the NW. [më pak]
The lava dome has remained relatively calm recently with few and mostly weak explosions every now and then, and little activity from the blocky lava flows on the flanks of the Caliente dome.
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).
Activity remained at low level, characterized by few (6 during yesterday) strombolian-type explosions that produce gray ash plumes rising 300-500 m above the crater.
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) ...more
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). ...more
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. [më pak]
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).
Eruptive activity has not changed much. The volcano observatory reported ongoing steam and ash emissions producing a plume oscillating between 1.5-3 km height above the crater and drifting into westerly directions, and occasional small to moderate explosions. Light ash fall occurred in Cevallos and Mocha. Incandescence was visible at the summit.
Seismic signal from Ruiz this morning (OLL station, INGEOMINAS)
Seismic activity is still elevated, but has been decreasing today, possibly meaning that the most recent magma intrusion is coming to an end (with no eruption).
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. ...more
This resulted in increased degassing, visible as a significant SO2 plume on NOAA satellite data. Surface activity, however, has remained low with very few emissions and only faint glow at the summit. [më pak]
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. ...more
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. [më pak]
This morning's seismic signal from Tungurahua (RETU station, IG)
Activity remains at moderate levels. Steam andash emissions produce plumes rising about 2 km from the crater, and occasional stronger explosions with cannon-shot noises can be heard (rarely seen) ejecting blocks that fall onto the outer upper slopes and tumble downhill. ...more
Continuous volcanic tremor can be seen on the seismic recordings. [më pak]
Pasto observatory reported an increase in seismic activity during the past week, with many small volcanic-tectonic quakes u to magnitudes of 2.6 at varying depths of up to 20 km underneath of La Plazuela crater on the northern sector of the volcanic complex.
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.
A SO2 plume is howering over Ambrym island, suggesting that the lava lakes continue to be active. Our next group going there next week will hopefully be able to confirm this by direct observation.
Seismic signal from Ruiz this morning (OLL station, INGEOMINAS)
More earthquakes have occurred at shallow depth beneath the volcano, including a magnitude 2.6 quake yesterday noon (local time) at 5 km NE beneath the Arenas crater, as well as some larger events later at night (no updates from Manizales observatory yet, though). The seismic swarm continues.
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. ...more
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. [më pak]
Activity has decreased - the lava flows stopped being alimented yesterday and the explosive activity has become weaker. Different from previous eruptive phases, this time, it did not culminate in a paroxysmal eruption.
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. ...more
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. [më pak]
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. ...more
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. [më pak]
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. ...more
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. [më pak]
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. ...more
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. [më pak]
Activity remains moderate with frequent small explosions detected on seismic signals and strong degassing producing a plume that was observed yesterday rising 800 m.
Ash emissions and explosions of moderate size have continued and generated a plume averaging 1-2 km in height above the crater. During the night, incandescence is visible at the summit. Some of the stronger explosions are accompanied by cannon-shot noises.
A small earthquake swarm occurred yesterday, probably caused by fluid movements bringing heat into the crater lake. Seismicity has calmed down today again.
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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