Saturday, Mar 31, 2012
The tremor signal has started to rise sharply, which could mean that the 23rd paroxysm of the New SE crater is about to occur.
Friday, Mar 30, 2012
Since this morning, weak Strombolian activity and ash emissions have been observed at the New SE crater. This could be the start of a build-up towards another paroxysm if the eruption pattern is the same as during most of the previous 22 eruptions since early 2011. At the moment, tremor signal is quiet low, but as the past has shown, it could change very quickly. The next paroxysm could probably occur anywhere between today and the next 2 weeks.
Thursday, Mar 29, 2012
No major eruptions have occurred during the past week. Iceland, Santorini and Etna remain quiet. In Indonesia, Krakatau and Semeru are very active, Ijen remains at high alert. Soufrière Hills on Montserrat seems to be waking up, while Puyehue in Chile's eruption is fading. ...more [read all]
Santiaguito volcano (Guatemala) activity update: explosions, lava dome growth, lava flow and occasional pyroclastic flows
Santiaguito volcano's activity remained at elevated levels during the past week, the latest USGS / GVP activity summary shows. ...more [read all]
Our expedition leader Doni just returned from a visit to Semeru and reports that on 27 March, he and our group observed frequent explosions every few minutes, with many powerful enough to eject glowing bombs to produce small glowing avalanches down on the southern flank of the volcano.
Wednesday, Mar 28, 2012
Authorities have decided to declare the eruption ended and shut down the web cameras at La Restinga and stop active monitoring of what could still be going or not down at the sea floor south of La Restinga.
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The growing lava dome inside Anak Krakatau's summit crater on 26 March 2012 (photo: Andi Rosati / VolcanoDiscovery)
According to scientists around geologist Dr. Shan de Silva from Oregon State University, the ground beneath the volcano is inflating and the magma chamber might be filling. Along with thousands of microquakes, this could indicate a future eruption. ...more
Monday, Mar 26, 2012
Tungurahua volcano's activity has been increasing, Ecuador's Instituto Geofísico reports. Throughout the morning of March 26, a constant column of steam and ash was rising from the summit crater, reaching up to 3 km height and drifting towards the northeast, where ash fall occurred. Ash fall was significant in the San Francisco and Black River areas, and mild in Baños, the Ventanas en Runtún, Juive, Pondoa, Puntzán and Cusúa sectors. ...more
Eruptive column above Tungurahua volcano reaching about 2 km height and heading towards the northeast. March 26, 2012, 09:30 (local time), L. Troncoso - IGEPN
As our colleague Marc from vulkane.net reports, the volcano Batu Tara in the Sunda Sea off the island of Flores in Indonesia had a larger than usual ash eruption today, which triggered an alert of the VAAC Darwin, who raised the aviation color code to "orange", as the drifting ash cloud is be a hazard to local air traffic. ...more
Popocatepétl volcano in Mexico has been showing signs of increased activity recently, The National Center for Disaster Prevention (CENAPRED) reported yesterday. ...more [read all]
Saturday, Mar 24, 2012
El Hierro volcano (Canary Islands): jacuzzi observed above underwater vent observed, suggesting that eruption continues
A small jacuzzi has been observed today and occasionally during the past days.
Friday, Mar 23, 2012
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Thursday, Mar 22, 2012
The Mexican 7.4 magnitude earthquake near Acapulco on Tuesday might have affected the currently dormant San Salvador volcano in 1000 km distance and triggered an earthquake swarm under the volcano. ...more [read all]
Results of recent inflation measurements of the Santorini volcano since 2011 published by Georgia University scientists
Santorini has remained relatively calm for 60 years since its last eruption in 1950, but started to re-awake in early 2011 with beginning inflation and increased seismic activity under the volcano. ...more
A relatively quiet week of volcanic activity has passed and as on every Thursday, the new Smithsonian / USGS Weekly Volcanic Activity Report is issued. It is summarized as follows: ...more [read all]
According to the latest activity report provided by USGS / GVP Smithsonian, the activity at Shiveluch has increased since 10 March and consisted of daily explosions that produced ash plumes that rose to altitudes of 3-5 km (10,000-16,400 ft) a.s.l. ...more
Wednesday, Mar 21, 2012
The earthquake swarm at Santorini island, Greece, which that had started 4 days ago continues with more small quakes inside the caldera at shallow depths of around 6 km. This could suggest another magmatic intrusion the volcanic system.
Sakurajima volcano on the Island of Kyushu, Japan, continues to be more active than usually at the moment. Yesterday, a stronger explosion occurred that produced an ash column reaching 3 km altitude (Flight Level 90 = 9,000 feet) which drifted to the south, as the Tokyo VAAC reported. ...more
Tuesday, Mar 20, 2012
Another series of explosions has occurred early today at Tungurahua volcano in Ecuador, the Instituto Geofísico (IG) reports. The eruption was reported to be very noisy and caused minor ash fall in nearby villages, but no damage. ...more [read all]
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Monday, Mar 19, 2012
The University of Las Palmas de Gran Canaria has published images of glowing lava seen floating at a depth of 70 m. This shows that the eruption continues.
After about 6 weeks of calm, another seismic swarm has started yesterday at Santorini, clustered in the NE sector of the island and near the submarine Kolumbo volcano. The quakes are very small and will not have been felt. The largest was a magnitude 2.0 quake on 18 March at 10:37 GMT at 11 km depth beneath Kolumbo volcano.
Another paroxysm has occurred at the New SE crater of Etna volcano yesterday 18 March 2012. This marks the 22nd eruption of this type since the start of the series in January 2010. ...more [read all]
Saturday, Mar 17, 2012
As expected, activity is increasing at the lava flow-front as renewed pressure propagates along the magmatic system, even as further (apparently smaller) pressure variations occur. Stay tuned for more pictures and detailed updates as our tour schedule and the eruption allows!
Since this morning, weak explosive activity has been observed from the new South East crater of Etna volcano. ...more
Scientists from the University of Las Palmas de Gran Canaria (ULPGC) aboard the research vessel Atlantic Explorer have published the first videos of the underwater volcanic cone in the Sea of Las Calmas south of El Hierro. The videos, taken by an underwater robot during their latest campaign, show that the eruption is continuing, but also suggest that the summit is still at 120 m rather than the 88 m found during the previous research campaign just 2 weeks earlier. ...more [read all]
Screenshot of the video taken at the southwestern flank of the main submarine cone at 170 m depth, showing what looks like round lava bombs (or pillow lava?)
Shiveluch volcano (Kamchatka) activity update: ongoing ash emissions reaching 6 km altitude (17,000 ft)
Shiveluch volcano in Kamchatka is erupting and generates a tall plume of ash reaching 17,000 ft (around 6.5 km altitude), the Tokyo Volcanic Ash Advisory Center (VAAC) reports. The ash cloud is drifting E to SE.
Friday, Mar 16, 2012
Sluggish lava flows are still filling the base of the pali, with renewed pressure and increase activity expected in the next 24 hrs.
Thursday, Mar 15, 2012
Cleveland Volcano in the Aleutian Islands has had a few small explosive ash eruptions, the last one on 14 March, the Alaska Volcano Observatory (AVO) reports. ...more [read all]
Lamongan volcano (East Java, Indonesia): signs of unrest, alert raised to yellow due to increased seismic activity
A new volcano in Indonesia, Lamongan volcano in Eastern Java, is showing signs of unrest: weak steaming from its active crater and increasing earthquakes were reported by Indonesian scientists. The increase in earthquakes started on 23 February and seismicity increased again significantly on 8 March when tremor was recorded continuously the next day. ...more [read all]
Wednesday, Mar 14, 2012
A small pyroclastic flow occurred from Montserrat's Soufrière Hills volcano on 9 March, MVO reports. The flow was small, but happened with no warning at around 5:20 pm (local time) from the western flanks of Soufriere Hills Volcano down into Spring Ghaut. ...more [read all]
Sakurajima volcano (Kyushu, Japan): unusually strong eruptions said to be the largest eruption in 2 years
Moderately large eruptions have occurred at Mt. Sakurajima volcano in southern Kyushu, Japan. During the past few days, several vulcanian-type explosions took place that ejected large amounts of bombs, with some of 50 cm diameter landing in up to 2 km distance. Ash plumes produced reached a modest altitude of 8000 ft (ca. 2.5 km) (VAAC Tokyo). ...more [read all]
Tuesday, Mar 13, 2012
A weak stain has been visible today above the submarine spot in the Las Calmas Sea south of La Restinga, and a jacuzzi occurred faint this morning at 07:30 am. Volcanic tremor seems to continue at constant, although minimal levels. This suggests that the eruption is indeed continuing.
Poas volcano (Costa Rica), activity summary Feb 2012: high-temperature fumarolic activity and sporadic small phreatic explosions
During February, Poás activity consisted in strong high-temperature fumarolic activity and sporadic small phreatic explosions, reported by park rangers. ...more [read all]
High-temperature fumaraoles from the comosite cone (the "dome") at the shore of Poás' crater lake (photo: E. Fernández, 24 Feb 2012)
Monday, Mar 12, 2012
Lava flows have advanced 0.6mi/1km from the base of the pali over the past 6 days but are still 1.4mi/2km from the ocean. Lower pressure in the volcano may cause a temporary slowdown in coming days.
A technically minor, but visually obvious design change was just implemented,- everything stays the same, but we thought to add a picture to the top... I hope you like the change! ...more
Ijen volcano (East Java, Indonesia): eruption warning due to increased seismic and degassing activity
The official alert level for Ijen volcano in East Java, Indonesia, has been raised again to 3 ("alert") due to an increase in activity, our Indonesian correspondant Andi reports. ...more [read all]
From about 13:00 (local time) today (12 March), Tungurahua volcano started erupting a constant column of steam and ash. At the same time, volcanic tremor was recorded. ...more [read all]
Sunday, Mar 11, 2012
After the eastern lava flow branch referred to in our previous post, first to reach the coastal plain in 2012, almost entirely stalled, the western flow branch has also reached the coastal plain this week, still about 2mi/3km away from the ocean. This western branch is feeding inflating pahoehoe lava flows at the base of the pali, which should continue for several days to fill in a low spot. However, this flow branch looks to have enough momentum to start travelling across the plain towards the ocean, though only time will tell! Check out our best pictures from this activity last night!
Friday, Mar 09, 2012
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The results of the latest bathymetric mapping survey by the crew of the oceanographic research vessel Ramon Margalef show that the eruption is still continuing, and could still go on for a very long time. ...more
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Following the steep increase of seismic activity a and eruption warning since 2 March, a new explosive eruption of Bezymianny volcano (the "volcano without name") in Kamchatka has started yesterday evening and is continuing. ...more [read all]
Thursday, Mar 08, 2012
Sakurajima volcano (Kyushu, Japan) activity update: increased numer and size of ash eruptions, reaching 1.2-3 km height above crater
Sakurajima volcano appears to be at higher levels of activity, as the last week has seen an increased average number and size of eruptions. According to the latest USGS / Smithsonian report "explosions during the past week "often" produced plumes that rose to altitudes of 1.2-3 km (4,000-10,000 ft) a.s.l. and drifted NW, E, and SE." Many obseervations of ash plumes originate of analysis of satellite data and dedicated Volcanic Ash Advisory Centers (VAAC) around the world monitor them and transmit real-time information about hazardous ash plumes to aircraft and air traffic control centers. Such reports are often complemented by direct observations from pilots passing nearby. ...more [read all]
Wednesday, Mar 07, 2012
The remote Bezymianny volcano in Kamchatka might be close to an eruption, as its seismic activity is continuously increasing, the Russian Institute of Volcanology and Seismology (KVERT) reported yesterday. ...more [read all]
Tuesday, Mar 06, 2012
The 2 German tourists who were kidnapped on 17 January from their camp on the Erta Ale volcano in the northern Danakil desert, Ethiopia, are reported to have been released, news agencies reported from Addis Ababa. ...more [read all]
Mount Marapi in West Sumatra continues to produce ash explosions during the past week. According to local news, a few weak explosions on Wednesday were followed by an eruption on Sunday morning produced an ash column about 1 km high, which traveled about 10 km southwards. The volcano is currently closed for climbers and a 3 km exclusion zone is in place. ...more [read all]
To the relief of Santorini's inhabitants, seismic activity under the volcano and near the island, which had experienced swarms and increased levels in recent months, seems to continue to remain calm.
On 5 March, the Instituto Geografico wrote that the eruption that had started on 10 October 2011 has ended. ...more
Monday, Mar 05, 2012
VolcanoDiscovery: Photo of the Day - contact between the metamorphic basement and volcanic rocks (Santorini Island, Greece)
Sunday, Mar 04, 2012
Ecuador's Instituto Geofísico (IG) reports an increase of Tunguarahua volcano's activity: Since last night (3 March), 4 explosions have been reported of moderate to large size. An explosion at 07:31 local time today produced an ash columnreaching about 4 km in height and drifting to the west - northwest. ...more [read all]
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Saturday, Mar 03, 2012
Occasional strombolian explosions are occurring from the summit vent of the New SE crater. At the moment, the tremor signal is very low and not indicating that a paroxysm is to be expected in the immediate future.
No immediate end of the eruption is in sight, although it continues at minimal intensity. Volcanic tremor has recovered to a weak and constant level, and occasionally one or two spots with stained water were observed on the sea surface. ...more
Thursday, Mar 01, 2012
Sporadic strombolian activity has resumed at the New SE crater early on 29 February. Explosions have been occuring at varying intervals between few minutes and more than 2 hours. The explosions were up to a few tens of meters high and occasionally threw incandescent bombs onto the southern flank of the cone.
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After some underground adjustments last week between Kīlauea and Mauna Loa volcanoes, pressure continues to push magma through Kīlauea's summit and east rift zone, erupting from the Peace Day Fissure on the east flank of Pu`u `O`o vent and building a lava tube system currently outletting near the top of the former Royal Gardens subdivision. ...more
Photo of the Day / Picture of the Day - VolcanoDiscovery - Sulphur crystals growing on lava rocks, Nea Kameni island, Santorini archipelago, Greece (Photo: Jan...
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