The Weekly Volcanic Activity Report: July 20 – 26, 2022
New activity/unrest was reported for 2 volcanoes from July 20 to 26, 2022. During the same period, ongoing activity was reported for 15 volcanoes.
Increase in earthquake activity under Lake Taupō, New Zealand
GeoNet is reporting an increase in earthquake activity under Lake Taupō since May 2022. Lake Taupō is a large caldera volcano, a special type of volcano that has rare but unusually large eruptions.
Two slow-motion earthquakes under North Island, New Zealand
Two slow-motion earthquakes have been taking place so far in 2022 under the central and eastern North Island, New Zealand. These events are like earthquakes in slow motion, unfolding over weeks to months and cannot be felt by humans.
Uplift at Askja volcano up to 35 cm (13 inches) since August 2021, Iceland
Scientists from the Institute of Geosciences, the Icelandic Met Office (IMO) and representatives of Iceland’s civil protection met on July 25, 2022, to discuss land changes and earthquakes at Askja volcano observed over the past few months.
Lava overflow at Stromboli volcano, Italy
Monitoring networks at Stromboli volcano recorded lava overflow from the volcano’s North crater area starting at 17:30 UTC on July 27, 2022.
Shallow M6.1 earthquake hits off the coast of Antofagasta, Chile
A strong and shallow earthquake registered by the USGS as M6.1 hit off the coast of Antofagasta, Chile at 04:15 UTC on July 28, 2022. The agency is reporting a depth of 44.5 km (27.6 miles). EMSC is reporting M6.1 at a depth of 45 km (27.9 miles); CSN Chile M6.2 at a depth of 55 km (34.1 miles).
Strong M6.2 earthquake hits Antofagasta, Chile at intermediate depth
A strong earthquake registered by the USGS as M6.2 hit Antofagasta, Chile at 18:58 UTC on July 27, 2022. The agency is reporting a depth of 99 km (61 miles). EMSC is reporting M6.0 at a depth of 78 km (48 miles).
Very strong and shallow M7.0 earthquake hits Luzon, Philippines
A very strong and shallow earthquake registered by PHIVOLCS as M7.0 hit Luzon, Philippines at 00:43 UTC (08:43 LT) on July 27, 2022. The agency is reporting a depth of 17 km (10.5 miles). USGS is reporting M7.0 at a depth of 10 km (6.2 miles), EMSC M7.1 at a depth of 10 km (6.2 miles).
Significant increase in seismicity under Chiles-Cerro Negro volcanic complex
A new increase in seismic activity has been recorded in the area of the Chiles-Cerro Negro Volcanic Complex (CVCCN) and its surroundings since May 2022, which includes volcano-tectonic and long-period earthquakes which are now at more shallow depths than those recorded in previous years.
Historic rainfall event hits St. Louis, leaving homes and highways submerged, U.S.
Historic levels of rainfall fell over St. Louis, Missouri overnight Tuesday, July 26, 2022, causing widespread flash flooding.
