Ash emission from Etna's New SE crater (Etna Trekking webcam)
Steaming and glow from Popocatépetl this morning
Etna (Sicily, Italy): Relatively intense strombolian activity and ash emissions continue at the New SE crater. INGV tremor data seems currently not to be available to see whether this is rising or not, and might be the beginning of another paroxysm. A steam and ash plume is rising about 1 km above the volcano. ...mehr
Popocatépetl (Central Mexico): Activity is on the increase again at the volcano, which currently is producing a strong steam plume illuminated by the glowing lava in the summit crater. [less]
Thermal webcam image of the crater area of Stromboli (INGV)
Ash emission from Etna's New SE crater this morning (INGV webcam)
Stromboli (Eolian Islands, Italy): Activity remains elevated, with magma filling the NE crater to the rim and sometimes relatively strong explosions. No significant new overflows have occurred since the last update. ...mehr
Etna (Sicily, Italy): Ash emissions and strombolian activity has continued since the last paroxysm and increased in frequency yesterday and today. The tremor signal has remained low, not suggesting that the volcano is in for another paroxysm at the moment, something quite different (so far) from the activity preceding the past paroxysms. [less]
This morning, a new lava flow emerged from the crater and started to flow down the southern flank towards the Trinidad canyon, reaching a length of 300 meters. Explosions continue and produce ash plumes rising to 4-4.2 km altitude (300-500 m above the crater), generating weak to moderate rumbling avalanches. INSIVUMEH warns that this activity could increase towards a more intense eruptive phase in the coming days, with larger explosions, and possibly pyroclastic flows. ...mehr
The other active volcanoes in Guatemala have not changed in their activity: Pacaya has weak strombolian activity, while the lava dome of Santiaguito, relatively calm these days, produces occasional weak explosions and weak avalanches from the active flows descending the flanks of the dome. [less]
Thermal webcam image of the crater area of Stromboli (INGV)
Depth vs time of the recent earthquakes west of Miyake island
Stromboli (Eolian Islands, Italy): The small lava flow issuing from the breached NE crater continues, but has not progressed much. Frequent glowing rockfalls descend the Sciara del Fuoco. ...mehr
Miyake-shima (Izu Islands): The earthquake swarm that started on 17 April and included a magnitude 5.6 quake has been decreasing and remained at the same depths at around 10-15 km just west off the island. [less]
Webcam image of the crater area of Stromboli (INGV)
Current seismogram from Telica volcano (TELN station INETER)
Stromboli (Eolian Islands, Italy): Magma stands high inside the conduits. A small overflow is occurring from the NE crater. The lava flow reaches about 100 meters length at the moment. Tremor and explosion signals are moderate to elevated. ...mehr
Shiveluch (Kamchatka): A possible explosion or partial lava dome collapse produced a modest ash plume yesterday rising to 12,000 ft (3.7 km) altitude (VAAC Tokyo). KVERT reports no significant changes and continues to record moderate tremor levels, indicating that magma continues to rise and slowly build up the lava dome. [less]
Indonesian volcanologists raised the alert level to 3 out of 4 ("Siaga", alert) on 19 April. The decision was based on an increase in block avalanches and seismicity including numerous volcanic-tectonic VA earthquakes (rock fracturing) and long-period VB events corresponding to internal fluid movements.
Not much has happened in the world of volcanoes yesterday: ...mehr
In Kamchatka, no change in seismic/eruptive behavior at the five active Kamchatkan volcanoes were reported: Tolbachik, Bezymianny, Sheveluch, Kizimen and Karymsky. Strong degassing produces moderate seismicity at Gorely. In Mexico, volcanic earthquakes, small explosions, rockfalls and pyroclastic flows continue at a high level at Colima volcano (Mexico). Activity at Popocatepetl volcano has diminished the past two days. Exhalations of gas (and occasional volcanic ash and blocks) occurred only about once every two hours on average. [less]
Radiostudio7 webcam image from Schiena dell'Asino showing a pyrocalstic flow
Etna (Sicily, Italy): (20 Apr) At the end of the eruption, partial collapse of the New SE crater's walls triggered pyroclastic flows that descended towards and partly into Valle del Bove. Here are two webcam images (thanks to Geoforum.fr): ...mehr
...20 Apr: After only 2 days since the previous eruption, the 12th paroxysm of the New SE crater occurred this afternoon. Following a build-up phase of strombolian explosions since yesterday, the eruption culminated with tall lava fountains and lava flows. [less]
After only 2 days since the previous eruption, the 12th paroxysm of the New SE crater occurred this afternoon. Following a build-up phase of strombolian explosions since yesterday, the eruption culminated with tall lava fountains and lava flows. ...mehr
At the end of the eruption, at least 2 pyroclastic flows towards the Valle del Bove were reported to have formed. After the eruption, lava flows continue to be active from vents at the base of the cone and descend towards Valle del Bove. [less]
INGV Catania corrected initial reports in that the lava flow front had actually NOT reached the sea during the night 17-18 April, but only about half way. Most likely, observers had confused glowing blocks detaching from the flow and descending to the sea with an actual coherent lava flow. [less]
The eruption has not changed significantly over the past weeks, with continuing activity in both the summit lava lake and lava flows on the rift zone, reaching the sea. ...mehr
A new inflation cycle has started yesterday and the lava lake in the Halema'uma'u summit crater, at about 30 m below the crater floor, has risen a bit. Within the Pu`u `O`o crater, the usual four sources on the crater floor (small lava pond on the northeast crater edge and 3 spatter cones) continued to glow overnight. [less]
Webcam image of the crater area of Stromboli (INGV)
Map of recent quakes near Miyake-Shimy volcano
Stromboli (Eolian Islands, Italy): (18 Apr) The lava flow continues to be alimented, but effusion rate has apparently dropped and only the upper portion of the flow seems currently active. The seismic signal shows strong eruption tremor and continuous rockfall signals. ...mehr
Etna (Sicily, Italy): (18 Apr) The 11th paroxysm from the New SE crater occurred as expected today. As during the previous eruption, the build-up phase with increasing strombolian activity was relatively long. The peak phase itself when activity culminated in lava fountains was comparably short. [less]
Depth vs time of quakes under Miake volcano (note: data after 17 April were not yet available)
A strong earthquake swarm, presumably caused by a magmatic intrusion, has started Wednesday at Miyake volcano in the Japanese Izu Islands. ...mehr
On Wednesday alone, JMA recorded 136 earthquakes with magnitudes up to an earthquake of magnitude 5.6, which was widely felt in the region. The quakes' hypocenters are clustered in a NNW-SSW trending area about 10 km west of the island, at depths of 5-15 km. [less]
We're a small specialist tour operator, but the website is much more. Although there is no professional webmaster behind the scenes, we bring to you a world of volcano and earthquake news, photos and more. [less]
The 11th paroxysmal eruption from the New SE crater occurred as expected today. As during the previous eruption a week ago, the build-up phase with increasing strombolian activity was relatively long (about 2 days). The peak phase itself when activity culminated in lava fountains was comparably short.
Thermal image of the crater area of Stromboli (INGV Catania)
Webcam image of the new lava flow on Stromboli this evening
Stromboli (Eolian Islands, Italy): The activity continued throughout the night and the lava flow has reached the sea at the base of the Sciara del Fuoco. At the moment, the new flow has decreased but remains weakly active and tremor elevated. ...mehr
...17 Apr: The new lava flow is well alimented and has reached several hundred meters down on the Sciara del Fuoco. Explosive activity continues as well. [less]
It seems likely that another paroxysm is in the making at the New SE crater: Strombolian explosions have continued throughout the night and this morning, and have been intensifying. Lava has now appeared at several vents on the fissure cutting through the New SE crater and the tremor signal is steeply rising, typical for the onset of another paroxysm.
The new lava flow on the upper Sciara del Fuoco this evening
Current seismic signal from Stromboli (ST8 station, INGV)
A new larger lava flow from the NE vent has started this afternoon to descend the Sciara del Fuoco, accompanied by glowing rockfalls and strong tremor. The eruption was preceded by very large strombolian explosions during the morning. [alles lesen]
Etna (Sicily, Italy): New activity has started from the New SE crater last night, when incandescent degassing vents were visible at the crater. This activity has progressively increased during the night and produced strombolian bursts during the second half of the night. Tremor has been showing a slow increase. ...mehr
Manam (Papua New Guinea): Eruptions continue. An ash plume rose to 10,000 ft (3 km) altitude this morning and the Rabaul Volcano Observatory raised the alert level to 3, following a strong increase in seismic activity. The aviation color code is at orange (VAAC Darwin). [less]
Bagana (Bougainville Island, Papua New Guinea): Activity at the volcano continues. A volcanic ash plume was observed at 6,000 ft (1.8 km) altitude and extending 15 nautical miles to the S and W. ...mehr
White Island (New Zealand): Tremor remains unstable. After a period of low intensity, strong tremor has reappeared today, reflecting internal fluid movements and degassing. [less]
Newberry earthquakes, 2011 - 2013 Map showing earthquakes located within the Newberry caldera from 2011 - 2013. Earthquakes from April 08-12, 2013, are colored orange or red (for April 12 events) (map: USGS)
Newberry (Oregon): A cluster of earthquakes has occurred during the past days under the caldera. USGS reports: ...mehr
"Between 8-12 April, five earthquakes were located within or along the margins of the Newberry caldera by the Pacific Northwest Seismic Network (PNSN, www.pnsn.org). The first two occurred at 04:19 & 04:20 PDT on 04/08 and were followed over the next 20 minutes by eight smaller (and therefore unlocatable) earthquakes. ... [read more] ... [show less] [less]
Newberry earthquakes, 2011 - 2013 Map showing earthquakes located within the Newberry caldera from 2011 - 2013. Earthquakes from April 08-12, 2013, are colored orange or red (for April 12 events) (map: USGS)
A cluster of earthquakes has occurred during the past days under the caldera. USGS reports: ...mehr
"Between 8-12 April, five earthquakes were located within or along the margins of the Newberry caldera by the Pacific Northwest Seismic Network (PNSN, www.pnsn.org). The first two occurred at 04:19 & 04:20 PDT on 04/08 and were followed over the next 20 minutes by eight smaller (and therefore unlocatable) earthquakes. "Three days later at 5:01 PDT a "low-frequency event", so-called because it lacks higher-frequency waves that are commonly observed in regular earthquakes, occurred at a depth of ~8 km. Finally on 04/12 two additional earthquakes occurred at 02:28 and 04:06 PDT. The largest of these five events was a M 1.2. These five events appear as orange or red (two most recent) circles in the below map-view plot. [less]
Strombolian eruption from NW crater today (INGV thermal webcam)
Current seismic recording from Colima volcano (Soma station, Univ. Colima)
Stromboli (Eolian Islands, Italy): Activity has remained more or less unchanged. Explosions, sometimes strong continue from several vents,and small amounts of viscous lava overspills the rims of the NE crater. ...mehr
Shiveluch (Kamchatka): KVERT reports no significant change in the activity (seismic and surface). Lava flows continue to effuse from the southern fissure. Tremor remains high, although it has continued to slowly decrease. [less]
Another relatively large eruption occurred this morning around 9am local time. The explosion produced an ash plume reported 4 km high (or: altitude?), and strong vibrations felt in up to 5 km distance.h a height of 1580 meters was still in alert status to level III. ...mehr
Authorities advise not to approach the volcano's summit within 2.5 km radius, which was declared a prohibited zone (villagers often go there to collect wood, grass etc.). [less]
Webcam image of the New SE crataer with the suspected new vent (bluish degassing) at its base
Current webcam image of Popocatépetl seen from the south (CENAPRED)
Etna (Sicily, Italy): Following yesterday's paroxysm, it seems that a new effusive vent has opened at the SE base of the New SE crater. ...mehr
Ruapehu (North Island): GNS reported that "the temperature of Crater Lake has started to rise and has now reached 30°C. It has been accompanied by some minor volcanic tremor. The chemistry data from our last sampling trip confirms the decline of temperature in the deep geothermal system. [less]
Current webcam image of Popocatépetl seen from the south (CENAPRED)
Current seismic signal from Popocatépetl
A phase of stronger, continuous emissions has started short time ago, accompanied by strong tremor. Over the past days, the volcano had been relatively calm, with 1-2 weak gas-steam-ash explosions per hour.
Thermal webcam image of the crater area of Stromboli with an eruption from the NW vent (INGV)
The growing new lava dome and the lava flow overspilling onto the western flank (Photo: Robin des Volcans)
Stromboli (Eolian Islands, Italy): Activity remains elevated. Lava continues to overspill from the lips of the NE crater, showing that the magma column stands high inside the conduit. Frequent strombolian explosions are reaching heights of 2-300 m and the tremor signal is strong again today. ...mehr
Etna (Sicily, Italy): A new paroxysm, the 10th such eruption in 2013, occurred today at Etna's New SE crater, after a several days-long phase of increasingly strong strombolian explosions. It culminated with lava flows and lava fountains and a tall ash plume. [less]
A new paroxysm, the 10th such eruption in 2013, occurred today at Etna's New SE crater, after a several days-long phase of increasingly strong strombolian explosions. It culminated with lava flows and lava fountains and a tall ash plume. ...mehr
Lava flows were erupted from the "saddle" area between the two Southeast Crater cones, toward the south and then southeast, from the summit vent of the New Southeast Crater itself toward southeast, and from vents on the northeast side of the cone. The eruptive activity started on the afternoon of 8 April with small strombolian explosions and gradually increased on 11 April. By the evening of yesterday, explosive activity had been almost continuous and produced powerful explosions and loud detonations that continued throughout the night and this morning, before finally merging into lava fountains this afternoon. [less]
The growing new lava dome and the lava flow overspilling onto the western flank (Photo: Robin des Volcans)
Current seismic recording from Colima volcano (Soma station, Univ. Colima)
The new lava dome continues to grow inside the crater that had formed during the eruptions in January and has by now been completely filled by the new lava. The dome overspills the old crater rims to the southerns and western sides and produces glowing avalanches as well as small ash explosions several times per hour. ...mehr
A recent field report describes the dome as a blocky mass of lava, that is slightly darker than the rest of the volcano, composed of blocks of many meters in size. Part of the dome continues as a thick tongue of viscous lava stretching about 100 m down on the upper western flank. The balance between the rate of alimentation of the flow and the loss of mass during avalanches will determine how long this lava flow will reach. In 2004, a similar flow had reached several kilometers, and it seems that during the current eruption, the rate of lava effusion is somewhat less. [less]
The eruption continued all night with strong strombolian explosions and the slow effusion of one or several lava flows from the eruptive fissure to the east. The explosions have been accompanied by loud bangs that rattled windows in many kilometers away and could be felt until the Ionian coast. ...mehr
The volcanic tremor has continued to rise to very high levels (as high as during the most powerful paroxysms of the past weeks) where it has now been stagnating for the past hours. [less]
Thermal webcam image of the crater area of Stromboli (INGV)
Thermal image of the crater area, showing the new lava flow and a strombolian burst at the New SE crater
Stromboli (Eolian Islands, Italy): Yesterday evening's lava flow has once again beeen very short-lived. Activity (effusion rate) sharply dropped late in the evening and today, only very small amounts of lava are still overspilling from the NE crater rim. Tremor and rockfall signals are much weaker as well. ...mehr
...10 Apr: A strong increase of activity occurred this afternoon. A relatively large, sustained lava flow has started to erupt from the breached NE cone and descend the Sciara del Fuoco. The process is accompanied by ongoing strong strombolian eruptions, mainly from the same NE vent, and strong continuous tremor. [less]
Thermal image of the crater area, showing the new lava flow and a strombolian burst at the New SE crater
The lava flow at night on the webcam
A strong increase of activity occurred this afternoon. A relatively large, sustained lava flow has started to erupt from the breached NE cone and descend the Sciara del Fuoco. The process is accompanied by ongoing strong strombolian eruptions, mainly from the same NE vent, and strong continuous tremor. ...mehr
Ash emission from Etna's New SE crater (INGV webcam)
Map of recent earthquakes at El Hierro (IGN)
Etna (Sicily, Italy): Strombolian explosions and relatively strong ash emissions from the New SE crater have continued throughout yesterday and the night, and seem to be gradually becoming more intense. ...mehr
However, this current behavior of Etna is a quite different from the usual more or less short build-up of activity the cone showed preceding the recent paroxysms. The tremor is slowly increasing. ... [read more] ... [show less] [less]
Ash emission from Etna's New SE crater yesterday afternoon (INGV webcam)
Etna (Sicily, Italy): Relatively strong ash explosions continue to occur from the New SE crater. At the same time, the tremor signal is rising - maybe we're about to witness the start of a new paroxysm? ...mehr
...9 Apr: New activity has started yesterday afternoon from the New SE crater. Several relatively intense explosive ash emissions were observed from the summit vent of the cone. They produced dense ash plumes rising about 200 m. More explosions occurred during the night, separated by intervals varying from 20 minutes to about 2 hours, during which strong degassing continued and the fumarolic area at the crater rim remained incandescent. [less]
New activity has started yesterday afternoon from the New SE crater. Several relatively intense explosive ash emissions were observed from the summit vent of the cone. They produced dense ash plumes rising about 200 m. More explosions occurred during the night, separated by intervals varying from 20 minutes to about 2 hours, during which strong degassing continued and the fumarolic area at the crater rim remained incandescent. ...mehr
The tremor showed a light increase during the night, but it is not clear at the moment, if this is already a precursor to yet another paroxysm. [less]
Depth vs time of recent earthquakes under El Hierro
Stromboli (Eolian Islands, Italy): No significant changes have occurred recently. The seismic signal shows medium tremor levels with phases of medium to high values, and there are frequent (about 10 per hour), sometimes quite powerful strombolian explosions from the various active vents. Small amounts of lava sometimes overspill from the NE vent. ...mehr
Tjörnes Fracture Zone (North of Iceland): The seismic swarm continues with a decreasing trend. "Only" 65 earthquakes have been counted so far today, the largest being a 3.3 event 14 km NE of Grímsey this morning. [less]
An increase in explosive activity has been noted since 2 April. Bombs have been ejected to the parking area below the summit cone, and the activity status (on a scale of 1-4) was raised from 1 to 2. If activity remains elevated, it will probably be further raised to 3 in the near future.
Earthquakes in the TFZ during the past 48 hours (Icelandic Met Office)
Small ash emission from Galeras yesterday (INGEOMINAS)
Tjörnes Fracture Zone (North of Iceland): The powerful earthquake swarm that started a week ago continues, but at reduced intensity compared to 2 April when the large magnitude 5.4 quake struck. Each day, hundreds of earthquakes have been occurring (more than 200 > magnitude 2 during the past 2 days). ...mehr
The earthquake swarm is the result of release of tectonic stress that has accumulated in the crust and is being released at the moment. The area is one of the main so-called transform zones,- regions where the separating Eurasian and North-American tectonic plates move sideways along strike-slip faults rather than spreading apart directly as is the case in the main rift zones, where also the main volcanoes are located, because the opening movment here allows large batches of magma to rise easily. ... [read more] ... [show less] [less]
Earthquakes in the TFZ during the past 48 hours (Icelandic Met Office)
Map of tectonic faults and rift zones in northern Iceland (Icelandic Met Office)
The powerful earthquake swarm that started a week ago continues, but at reduced intensity compared to 2 April when the large magnitude 5.4 quake struck. Each day, hundreds of earthquakes have been occurring (more than 200 > magnitude 2 during the past 2 days). ...mehr
The earthquake swarm is the result of release of tectonic stress that has accumulated in the crust and is being released at the moment. The area is one of the main so-called transform zones,- regions where the separating Eurasian and North-American tectonic plates move sideways along strike-slip faults rather than spreading apart directly as is the case in the main rift zones, where also the main volcanoes are located, because the opening movment here allows large batches of magma to rise easily. The transform zones separate the rift zones at spreading plate boundaries at regular intervals in order to accommodate differential movements that are a result of the earth's curved surface where rigid plates move apart. In the transform zones, the sideways movement can produce much more strain in the rocks and has therefore the potential of larger earthquakes. [less]
The Caliente lava dome of Santiaguito this morning
Telica seismogram this morning (TELN station INETER)
It seems we have had a relatively calm day (for the volcano world) so far: ...mehr
Shiveluch (Kamchatka): Moderate seismic activity and weak shallow earthquakes were registered. Hot avalanches (collapse of parts of the growing dome) and possibly explosions accompanying this process produced a plume rising to 20,000 ft (6 km) altitude yesterday. Strong degassing and steaming are continuous. [less]
Distribution of the recent earthquakes under El Hierro (IGN) - note the distinct two layers at about 20 and 10 km depth
Etna (Sicily, Italy): Today is a very sad day for all free people who like Etna: Etna has become a "forbidden volcano". ...mehr
Maybe intimidated by the recent lava fountains of Etna, the Prefecture of Catania has decided to take strict measures and published a strict ruleset what is allowed and what not, to protect us from the dangerous volcano: ... [read more] ... [show less] [less]
Today is a very sad day for all free people who like Etna: Etna has become a "forbidden volcano". ...mehr
Maybe intimidated by the recent lava fountains of Etna, the Prefecture of Catania has decided to take strict measures and published a strict ruleset what is allowed and what not, to protect us from the dangerous volcano: 4 volcanic hazard and alert levels, ranging from "Normal" to "Alarm" were defined and decide which kind of activity will be allowed in the future on the volcano. [less]
Etna (Sicily, Italy): Etna's New SE Crater produced the 9th episode of lava fountaining (paroxysm) yesterday, and has now again fallen back to quiet, but for how long nobody knows. The intervals between the past paroxysms seem to follow an exponential trend of being roughly double each time... [less]
Volcanic earthquakes continue at high rate, and there is increased SO2 degassing, as the surface expression of fresh magma intruding at shallow depth. ...mehr
In an Instituto Geofísico de Perú (IGP) report from 1 April, a photo showed a fumarolic plume rising above Sabancaya on 8 March. During the third week of March, a bluish colored plume rose 500 m above the crater, possibly indicating sulfur dioxide emissions. On 25 March the seismic network detected a continuing high rate of volcano-tectonic (VT) earthquakes and an increasing number of long-period (LP) events. On 27 March and 1 April VT earthquakes continued to be dominant and located below the NE sector of the crater. The number and amplitude of LP events did not change. (from today's Smithsonian / USGS Weekly Volcanic Activity Report) [less]
A new eruption occurred yesterday at the volcano. SERNAGEOMIN reported that at 09:20 (local time) on 3 March degassing became more intense at the volcano. The plumes were sometimes grey colored, suggesting slight ash content. Incandescence was visible at night. Despite this activity, seismicity remains normal. The (official) Alert Level remains at GREEN.
An eruption from Ivan Grozny volcano was reported yesterday by the Voice of Russia (German edition). According to the short news article, nearby villages received ash fall, and 2 millimeters of ash fell in Kurilsk town. Clouds prevented direct observations, and there was no sulfur odor detected. ...mehr
Civil protection assured the population that there was no danger, the Voice of Russia wrote. [less]
Lava fountain from Etna's New SE crater during the 9th paroxysm (Photo: Boris Behncke)
Exploding lava bubbles during the first phase of the paroxysm (Photo: Boris Behncke)
As expected, Etna's New SE Crater produced a new episode of lava fountaining (paroxysm) on 3 April 2013. It was the 34th paroxysm since January 2011 at Etna and according to eyewitnesses, it was the loudest such eruption ever witnessed in recent years. "Especially toward the end, Etna thundered, growled, howled, yelled like a gigantic beast in agony. It almost hurt your ears at a distance of 6.4 km." ...mehr
The build-up phase lasted several hours, and produced many extremely powerful explosions of exploding liquid lava bubbles that threw bombs to all over the New SE crater cone. After a few hours, these explosions finally merged into sustained lava fountains that rose hundreds of meters above the cone. A large ash plume drifted to the SE where heavy fallout of scoria occurred. [less]
A complete review of volcanic activity world-wide during the past month, prepared by our collaborator Lucas Wilson. ...mehr
Also in this issue, read why Chaitén is probably more active than thought, and why Machin could be a good candidate for a next "Pinatubo" eruption. [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]
Lava fountain from Etna's New SE crater during the 9th paroxysm (RadioStudio7 webcam)
Current seismic signal (IGN)
Etna (Sicily, Italy): The 9th paroxysmal eruption from Etna's New SE crater in 2013 has occurring this afternoon and is currently at its peak phase it seems. ...mehr
It is producing lava fountains and lava flows from the fissure vent of the New SE cone that descend into Valle del Bove. [less]
It seems almost certain that a new paroxysmal eruption is in the making at the New SE crater of Etna. Tremor has started to rise sharply and reached already 5 times background level. You can follow the events live at webcams.volcanodiscovery.com/Etna.
Current seismic signal from Stromboli (ST8 station, INGV)
White sandstone xenolith from the 16 Mar New SE paroxysm
Stromboli (Eolian Islands, Italy): Tremor and explosion signals have further increased today, but no significant new lava overflows have occurred. ...mehr
Etna (Sicily, Italy): Closer inspection of the "white lava" reported in yesterday's news revealed that these were so-called xenoliths, i.e. no lava at all, but pieces of sedimentary rock from strata underlying the volcano brought up by the rising magma. In this case, they are pieces of barely compacted beach sandstone, similar to the xenoliths ejected during the flank eruptions in 2011 and 2012, which are believed to have trapped a different (so-called eccentric) shallow magma chamber beneath the volcano. To find such xenoliths as produces of eruptions from the SUMMIT craters is highly unusual and could (*speculation*) indicate that the latest, violent, eruptive episode has actually involved a different magma reservoir as well. [less]
White sandstone xenolith from the 16 Mar New SE paroxysm
Closer inspection of the "white lava" reported in yesterday's news revealed that these were so-called xenoliths, i.e. no lava at all, but pieces of sedimentary rock from strata underlying the volcano brought up by the rising magma. In this case, they are pieces of barely compacted beach sandstone, similar to the xenoliths ejected during the flank eruptions in 2011 and 2012, which are believed to have trapped a different (so-called eccentric) shallow magma chamber beneath the volcano. To find such xenoliths as produces of eruptions from the SUMMIT craters is highly unusual and could (*speculation*) indicate that the latest, violent, eruptive episode has actually involved a different magma reservoir as well. ...mehr
Fresh snow has now covered much of the bombs from the recent eruption. [less]
Stromboli's NE crater with glowing bombs on its flanks from an explosion (INGV webcam)
Sample of the White Lava erupted during the 16 Mar paroxysm (OPEC)
Stromboli (Eolian Islands, Italy): The NE crater continues to produce spectacular and relatively large explosions of bursting lava bubbles. Tremor as well is elevated. ...mehr
Etna (Sicily, Italy): (31 Mar) Etna volcano might have begun a process of deep transformation in its eruption style, new scientific studies suggest. [less]
Explosion from Krakatau on 28 March 2013 (Photo: Oystein Lund Andersen)
A small eruption took place at the volcano from 11th-12th March. The eruption produced Andesite volcanic bombs which littered the old crater rim and produced ...mehr
impact craters. During a brief visit to the volcano from 22nd – 24th March, a small steam plume (emitted from two vents in the crater) was seen rising 300 – 400 M above the crater. Glow from the crater was seen at night time, which was from hot gas. [less]
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