The Weekly Volcanic Activity Report: July 23–29, 2025
New activity/unrest was reported for 4 volcanoes from July 23 to 29, 2025. During the same period, ongoing activity was reported for 19 volcanoes.
Flash flood after cloudburst kills three in Mandi, Himachal Pradesh, during early-morning hours
A cloudburst triggered a destructive flash flood in Mandi, Himachal Pradesh, early on July 29, 2025, killing three people from the same family and leaving one missing.
Extratropical cyclone brings damaging winds and coastal flooding to Rio Grande do Sul, Brazil
An extratropical cyclone impacted Rio Grande do Sul, Brazil, between July 28 and 29, 2025, producing wind gusts over 100 km/h (62 mph) and waves reaching 3.5 m (11 feet), causing widespread structural damage, coastal flooding, and large-scale power outages.
Severe floods leave at least 25 dead and thousands displaced in Yola, Adamawa State, Nigeria
Torrential rain combined with suspected dam water release caused severe flooding in Yola, Adamawa State, Nigeria, on July 27, 2025, leaving at least 25 people dead, 55 injured, and thousands displaced.
Tsunami waves up to 1.7 m (5.7 feet) recorded in Hawaii after M8.8 Kamchatka earthquake on July 29, no major damage reported
A tsunami generated by the M8.8 earthquake off Russia’s Kamchatka Peninsula on July 29, 2025, produced waves of up to 1.7 m (5.7 ft) across parts of Hawaii, prompting evacuations, port closures, and widespread coastal alerts. No significant damage or casualties have been reported.
Powerful M8.8 earthquake and tsunami strike Kamchatka Peninsula, sixth strongest earthquake on record
A powerful earthquake registered by the USGS as M8.8 hit near the coast of Kamchatka, Russia, at 23:24 UTC on July 29, 2025 (11:24 local time on July 30). The earthquake occurred at a depth of approximately 21 km (13 miles) and generated a Pacific-wide tsunami, prompting warnings, advisories, and evacuations across multiple countries and territories.
Deep M6.6 earthquake hits south of the Fiji Islands
A deep earthquake registered by the USGS as M6.6 hit south of the Fiji Islands at 17:53 UTC on July 29, 2025. The agency is reporting a depth of 553 km (331 miles). EMSC is reporting the same magnitude and depth.
Powerful derecho brings destructive winds to South Dakota, Iowa, and Minnesota
A destructive derecho swept through the central United States from the evening of July 28 into early July 29 2025, producing wind gusts up to 160 km/h (99 mph), toppling trees, and causing widespread power outages.
30 dead and over 80 000 evacuated as extreme rainfall hits Beijing, China
At least 30 people died and more than 80 000 were evacuated in Beijing, China, after record rainfall from July 26–28, 2025, caused severe flooding and landslides.
Hurricane Iona and Tropical Storm Keli form off the coast of Hawaii
Hurricane Iona and Tropical Storm Keli formed southeast of Hawaii on July 28, 2025, becoming the first two named cyclones of the 2025 central Pacific hurricane season. Iona was named in the NHC advisory issued at 03:00 UTC and reached hurricane strength by 15:00 UTC the same day. Keli followed approximately 18 hours later, reaching tropical storm strength by 21:00 UTC. Both systems are moving westward and are not expected to make landfall.
