The Weekly Volcanic Activity Report: October 25 – 31, 2023
New activity/unrest was reported for 8 volcanoes from October 25 to 31, 2023. During the same period, ongoing activity was reported for 20 volcanoes.
M6.2 earthquake hits Timor region, Indonesia
A strong earthquake registered by the BMKG as M6.2 hit the Timor region, Indonesia at 21:04 UTC on November 1, 2023 at a depth of 45 km (28 miles). USGS is reporting M6.1 at a depth of 36 km (22 miles); EMSC M6.0 at a depth of 39 km (24 miles).
State of emergency declared in El Salvador due to Tropical Storm “Pilar”
Tropical Storm Pilar led to the death of two individuals and left one person missing in El Salvador on Tuesday, October 31, 2023. The storm unleashed torrential rains, strong winds, and caused widespread flooding, prompting a state of national emergency.
Extreme weather disrupts life in northern Italy, causing flooding and blackouts
Extreme weather conditions wreaked havoc in northern Italy on Tuesday, October 31, 2023, causing the Seveso River in Milan to overflow and leading to a landslide that closed the Brenner motorway.
Ash cloud produced by eruption at Klyuchevskoy reaches 14 km (46 000 feet) a.s.l., Russia
Significant activity was reported at Klyuchevskoy volcano in Kamchatka, Russia, on October 31, 2023. The Aviation Color Code was raised to Red at 02:34 UTC, and satellite data indicated an ash column reaching up to 14 km (46 000 feet) above sea level at 23:10 UTC.
Exceptionally intense earthquake swarm near Þorbjörn, Iceland
An exceptionally intense earthquake swarm lasting nearly two hours started at Þorbjörn in Iceland at 08:40 on October 31, 2023. The largest event registered an M3.7, and the activity signaled potential magma movement at depths between 1.5 km and 5 km (0.93 – 3.1 miles).
Tropical Storm “Pilar” producing heavy rain over portions of Central America
Tropical Storm “Pilar” formed offshore Central America at 03:00 UTC on Monday, October 30, 2023, as the 16th named storm of the 2023 Pacific hurricane season. The forecast shows Pilar nearing the El Salvador or Nicaragua coast late today to early Wednesday, with the core likely staying offshore. The storm is expected to move west-southwest away from land by Thursday.
Strong and shallow M6.6 earthquake hits near the coast of Atacama, Chile
A strong and shallow earthquake registered by the CSN Chile as M6.6 hit near the coast of Atacama, central Chile at 12:33 UTC (09:33 LT) on October 31, 2023. The agency is reporting a depth of 46 km (28 miles). USGS and EMSC are reporting M6.7 at a depth of 41 km (25 miles).
Deep M6.5 earthquake hits Fiji region
A strong and deep earthquake registered by the USGS as M6.4 hit the Fiji region at 11:10 UTC on October 31, 2023. The agency is reporting a depth of 547 km (339 miles). EMSC is reporting the same magnitude and depth.
Mount St. Helens experiences largest seismic increase since last eruption ended in 2008, US
Elevated seismic activity has been observed at Mount St. Helens in the United States since 2008 when the last eruption ended. No significant changes have been observed in other monitoring parameters and there are no signs of an imminent eruption.
