Small explosion signals from Pavlof volcano have been detected on the infrasound network located at Sand Point and on the local seismic network on October 19, 2019.
It is unknown if the explosions produced any volcanic ash, but their small size suggests any hazard is currently confined to the area around the volcano's summit, the Alaska Volcano Observatory (AVO) reports.
Because these signals are above normal background for Pavlof, AVO is raising the Aviation Color Code to YELLOW and the Alert Level to ADVISORY.
Low-frequency seismic tremor and vigorous steam plume have been observed at Pavlof volcano, Alaska on May 14 and 15, 2019.
"While this does not mean that an eruption is likely or imminent, past eruptions of Pavlof occurred with little or no warning," AVO said at the time.
The last known eruption at this volcano took place in 2016 (VEI 2).
The most active volcano of the Aleutian arc, Pavlof is a 2 519-m-high (8 264 feet) Holocene stratovolcano that was constructed along a line of vents extending NE from the Emmons Lake caldera.
Pavlof and its twin volcano to the NE, 2 142-m-high (7 027 feet) Pavlof Sister, form a dramatic pair of symmetrical, glacier-covered stratovolcanoes that tower above Pavlof and Volcano bays.
A third cone, Little Pavlof, is a smaller volcano on the SW flank of Pavlof volcano, near the rim of Emmons Lake caldera.
Unlike Pavlof Sister, Pavlof has been frequently active in historical time, typically producing Strombolian to Vulcanian explosive eruptions from the summit vents and occasional lava flows. The active vents lie near the summit on the north and east sides.
The largest historical eruption took place in 1911, at the end of a 5-year-long eruptive episode, when a fissure opened on the N flank, ejecting large blocks and issuing lava flows. (GVP)
Featured image credit: USGS/AVO, David Fee
September 23, 2021
Lava flows continue slowly advancing toward the coast on September 23, 2021, after another night of intense lava fountains at Cumbre Vieja volcano, La Palma, Canary Islands. The height of the volcanic plume is estimated at 4.2 km (13 800 feet) above the volcano....
September 15, 2021
Heavy rains affecting parts of Indonesia on September 13 and 14, 2021, caused rivers to overflow, floods and landslides. According to the ASEAN Coordinating Centre for Humanitarian Assistance on Disaster Management (AHA Centre), at least 11 839 people have been...
September 07, 2021
Beijing's 2021 flood season (June 1 to August 31) ended with the highest average precipitation in the recent 20 years. The average precipitation of the city reached 627.4 mm (24.7 inches) during this year's flood season, which is approximately 70% more than...
August 31, 2021
A rare August snowfall blanketed swathes of Chile's Atacama desert on August 25, 2021, with parts of it reportedly receiving as much as 82 cm (32 inches). "This does not occur yearly. Maybe a relatively important snowfall like the one today can happen...
August 20, 2021
Heavy rainfall affecting the Ethiopian capital Addis Ababa on August 17, 2021, caused severe flash floods that resulted in heavy damage and fatalities. Homes and cars in several neighborhoods of the capital were submerged, leading to at least 7 fatalities and dozens...
Producing content you read on this website takes a lot of time, effort, and hard work. If you value what we do here, please consider becoming a supporter.