June 01, 2014 - GLOBAL VOLCANISM - The following constitutes the new activity, unrest and ongoing reports of volcanoes across the globe, courtesy of Volcano Discovery.
Sangeang Api (Indonesia): After the violent eruption on Saturday, a strong initial explosion followed by at least 3 other, but smaller explosions and ash emissions until yesterday, activity at the volcano has calmed down significantly.
Weaker ash and steam emissions still continue but at significantly reduced intensity.
The Indonesian Volcanological Survey (VSI) lowered the alert status back to 2 ("waspada") on a scale of 1-4.
BNPB, Indonesian Civil Defense, has distributed more than 15,000 dust masks to people in the town of Bima at about 40 km distance to the SW.
The plume from the original explosion continues to spread and dissipate over a vast area between Indonesia and northern Australia. Flights to and from Darwin airport are reported to resume today.
Cumbal (Colombia): Seismic unrest continues at the volcano, still on alert status Yellow, with little variation over the past months. The Pasto volcano observatory reported a 50% increase in earthquakes during the past week.
Most earthquakes were associated with internal fluid movements. The other quakes, all very small, were due to rock fracturing at shallow depths. No other signs of unrest were observed at the volcano recently.
Sotará (Colombia): Seismic activity associated with rock fracturing processes under the volcano showed a slight increase during the past week. The earthquakes occurred mainly under the Paletará valley, approximately 12 km northeast of the volcano at depths between 6 and 10 km, and had local magnitudes between 0.3 and 2.2 on the Richter scale.
Slight deformation has been detected at the volcano, but no changes or signs of activity are visible at the surface. The volcano remains at Yellow alert.
Etna (Sicily, Italy): Activity has decreased. No new ash emissions from the Bocca Nuova could be noticed on webcam images and the strombolian activity at the New SE crater, although still present, has weakened and become much more sporadic as well.
WATCH: Etna volcanic activity on May 30 and 31.
San Miguel (El Salvador): Small ash emissions were reported at Chaparrastique volcano yesterday. Local observers heard rumblings and noticed ash fall in the area of Alpina Carreto.
Apart from a possible eruption, a major hazard is posed by mud slides and mud flows at the slopes of the volcano. Civil protection ordered new evacuations. According to local press, school classes were suspended in 12 schools located within 5 kilometers radius of Chaparrastique due to landslides in the area generated by the rains.
Pagan (Mariana Islands): USGS reports that "low-level unrest continued at Pagan Volcano throughout the past week. Seismic activity remains above background. A vapor plume was visible in web camera and satellite images.
Volcanic gas from Pagan may be noticed downwind of the volcano as a distinctive sulfurous odor." The Aviation Color Code remains at YELLOW.
Pavlov (Alaska Peninsula, USA): After about 1 year of pause, a new eruption started at the volcano on 30 May. Ground observers saw a small lava flow from a vent on the upper NE side of the cone.
"Satellite imagery shows elevated surface temperatures. A low level steam plume is visible in satellite imagery and in the FAA web camera located in Cold Bay. Several pilots reported a gas and ash plume drifting north at 7,000 to 8,000 feet above sea level. Based on these observations AVO raised the Aviation Color Code to ORANGE." (AVO)
Fuego (Guatemala): Activity at the volcano continued with little variation as intermittent strombolian explosions of small to moderate size. Incandescent material was ejected to about 100 m height and fell back to form glowing avalanches on the upper crater. Ash plumes rose to 400-700 m height and drifted for approx. 8 km before dissipating.
Santa María / Santiaguito (Guatemala): Ongoing rainfall has been causing a number of mud flows (lahars) in the rivers draining from Santiaguito, including Samala, San Isidro and Tambor.
A first large hot lahar descended the Nima I river bed yesterday. The sulfur-smelling mud flow was about 25 m wide and 3 m deep, carrying blocks of up to 50 cm in diameter and pieces of tree trunks and branches of up to 2 m. On its passage near the observatory, it made the ground vibrate. The lahar drained into the Samala river.
Turrialba (Costa Rica): The volcano could be becoming more active with increased degassing. An elevated SO2 concentration in the atmosphere above and near the volcano was visible on satellite data yesterday. Seismic activity appears to be elevated.
Galeras (Colombia): Activity at the volcano is currently low.
Seismic activity and gas emissions are at low to moderate levels. No recent ash emissions have occurred.
Cerro Negro de Mayasquer (Colombia): Unrest at the volcano continues in the form of earthquakes under the Chiles-Cerro Negro volcanic massif. During the past week, the monitoring network recorded around 6500 quakes, mostly located less than 4 km SW from the summit at depths ranging between 1 and 8 km and with magnitudes of up to 4.0 on the Richter scale.
Most of the earthquakes are volcanic-tectonic, i.e. associated with the fracturing of rock due to fluid pressure underground.
On May 21, 3 earthquakes at 02:53, 15:44 and 18:46 local time were felt felt by local inhabitants.
Reventador (Ecuador): A moderate explosion at the volcano produced an ash plume that rose to flight level 210 (21,000 ft / 6.5 km altitude), a pilot reported.
Complete Earthquake list (worldwide) for June 1, 2014.
- Volcano Discovery.
Sangeang Api (Indonesia): After the violent eruption on Saturday, a strong initial explosion followed by at least 3 other, but smaller explosions and ash emissions until yesterday, activity at the volcano has calmed down significantly.
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| Eruption column and pyroclastic flow over water at Sangeang Api yesterday (picture: Sofyan Efendi) |
Weaker ash and steam emissions still continue but at significantly reduced intensity.
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| NASA satellite image of the ash plume and continuing ash emissions this morning (annotation: Culture Volcan) |
The Indonesian Volcanological Survey (VSI) lowered the alert status back to 2 ("waspada") on a scale of 1-4.
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| Dissipating aerosol plume from Saturday's eruption at Sangeang Api |
BNPB, Indonesian Civil Defense, has distributed more than 15,000 dust masks to people in the town of Bima at about 40 km distance to the SW.
The plume from the original explosion continues to spread and dissipate over a vast area between Indonesia and northern Australia. Flights to and from Darwin airport are reported to resume today.
Cumbal (Colombia): Seismic unrest continues at the volcano, still on alert status Yellow, with little variation over the past months. The Pasto volcano observatory reported a 50% increase in earthquakes during the past week.
Most earthquakes were associated with internal fluid movements. The other quakes, all very small, were due to rock fracturing at shallow depths. No other signs of unrest were observed at the volcano recently.
Sotará (Colombia): Seismic activity associated with rock fracturing processes under the volcano showed a slight increase during the past week. The earthquakes occurred mainly under the Paletará valley, approximately 12 km northeast of the volcano at depths between 6 and 10 km, and had local magnitudes between 0.3 and 2.2 on the Richter scale.
Slight deformation has been detected at the volcano, but no changes or signs of activity are visible at the surface. The volcano remains at Yellow alert.
Etna (Sicily, Italy): Activity has decreased. No new ash emissions from the Bocca Nuova could be noticed on webcam images and the strombolian activity at the New SE crater, although still present, has weakened and become much more sporadic as well.
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| Weak (but among the strongest during past night) strombolian activity at the New SE crater |
WATCH: Etna volcanic activity on May 30 and 31.
San Miguel (El Salvador): Small ash emissions were reported at Chaparrastique volcano yesterday. Local observers heard rumblings and noticed ash fall in the area of Alpina Carreto.
Apart from a possible eruption, a major hazard is posed by mud slides and mud flows at the slopes of the volcano. Civil protection ordered new evacuations. According to local press, school classes were suspended in 12 schools located within 5 kilometers radius of Chaparrastique due to landslides in the area generated by the rains.
Pagan (Mariana Islands): USGS reports that "low-level unrest continued at Pagan Volcano throughout the past week. Seismic activity remains above background. A vapor plume was visible in web camera and satellite images.
Volcanic gas from Pagan may be noticed downwind of the volcano as a distinctive sulfurous odor." The Aviation Color Code remains at YELLOW.
Pavlov (Alaska Peninsula, USA): After about 1 year of pause, a new eruption started at the volcano on 30 May. Ground observers saw a small lava flow from a vent on the upper NE side of the cone.
![]() |
| MODIS hot spots at Pavlov volcano (MODVOLC, Univ. Hawaii) |
"Satellite imagery shows elevated surface temperatures. A low level steam plume is visible in satellite imagery and in the FAA web camera located in Cold Bay. Several pilots reported a gas and ash plume drifting north at 7,000 to 8,000 feet above sea level. Based on these observations AVO raised the Aviation Color Code to ORANGE." (AVO)
Fuego (Guatemala): Activity at the volcano continued with little variation as intermittent strombolian explosions of small to moderate size. Incandescent material was ejected to about 100 m height and fell back to form glowing avalanches on the upper crater. Ash plumes rose to 400-700 m height and drifted for approx. 8 km before dissipating.
Santa María / Santiaguito (Guatemala): Ongoing rainfall has been causing a number of mud flows (lahars) in the rivers draining from Santiaguito, including Samala, San Isidro and Tambor.
A first large hot lahar descended the Nima I river bed yesterday. The sulfur-smelling mud flow was about 25 m wide and 3 m deep, carrying blocks of up to 50 cm in diameter and pieces of tree trunks and branches of up to 2 m. On its passage near the observatory, it made the ground vibrate. The lahar drained into the Samala river.
Turrialba (Costa Rica): The volcano could be becoming more active with increased degassing. An elevated SO2 concentration in the atmosphere above and near the volcano was visible on satellite data yesterday. Seismic activity appears to be elevated.
Galeras (Colombia): Activity at the volcano is currently low.
Seismic activity and gas emissions are at low to moderate levels. No recent ash emissions have occurred.
Cerro Negro de Mayasquer (Colombia): Unrest at the volcano continues in the form of earthquakes under the Chiles-Cerro Negro volcanic massif. During the past week, the monitoring network recorded around 6500 quakes, mostly located less than 4 km SW from the summit at depths ranging between 1 and 8 km and with magnitudes of up to 4.0 on the Richter scale.
Most of the earthquakes are volcanic-tectonic, i.e. associated with the fracturing of rock due to fluid pressure underground.
On May 21, 3 earthquakes at 02:53, 15:44 and 18:46 local time were felt felt by local inhabitants.
Reventador (Ecuador): A moderate explosion at the volcano produced an ash plume that rose to flight level 210 (21,000 ft / 6.5 km altitude), a pilot reported.
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| Ash explosion at Reventador today (IGPEN webcam) |
Complete Earthquake list (worldwide) for June 1, 2014.
- Volcano Discovery.

















