A shallow earthquake registered by the USGS as M5.9 hit off the coast of Oregon at 06:45 UTC on September 26, 2025 (23:45 local time, September 25). The USGS is reporting a depth of 10 km (6.2 miles). EMSC is reporting the same magnitude and depth.
Tropical Storm Humberto is forecast to strengthen into a major hurricane by the weekend, while tropical disturbance AL94 shows high chance of cyclonic development within 2 days from September 26, 2025.
A large sea surface temperature anomaly has developed in the North Pacific Ocean, extending toward the U.S. West Coast. Forecasts suggest the anomaly could help trigger colder-than-average conditions across central and eastern United States and Canada during the upcoming 2025/26 winter season, with a weak La Niña further reinforcing the setup.
A strong atmospheric river is forecast to shift southward along the British Columbia coast between September 26 and 29, 2025, bringing several low-pressure systems and periods of heavy rainfall to Vancouver Island and the South Coast. Forecasts suggest up to 100 mm (4 inches) of rain in west-facing coastal mountains, with persistent showers likely across the Lower Mainland.
At least 14 people were killed and 46 remain missing after the Maitai’an Creek barrier lake overflowed in Hualien County, Taiwan, on September 23, 2025. The flood, triggered by extreme rainfall from former Typhoon Ragasa, released about 60 million tonnes of water downstream, inundating Guangfu Township and nearby areas.
Heavy to excessive rainfall from monsoon thunderstorms may bring isolated flash and urban flooding to the Desert Southwest into Sunday, September 28, 2025. A plume of anomalously high monsoonal moisture streaming northward on the eastern flank of a slow-moving upper-level low will fuel several rounds of widespread showers and thunderstorms, with greatest impacts expected across southeastern Arizona and southwestern New Mexico.
New activity/unrest was reported for 6 volcanoes from September 17 to 23, 2025. During the same period, ongoing activity was reported for 23 volcanoes.
Tropical Storm Humberto formed on September 23, 2025, as the 8th named storm of the 2025 Atlantic Hurricane Season. While it doesn’t pose any threat to land as of now, the system is expected to strengthen into the 3rd hurricane of the season in a few days before becoming a major hurricane by September 28.
A strong earthquake registered by the USGS as M6.3 hit northern Venezuela at 03:51 UTC on September 25 (23:51 local time on September 24), 2025. The agency is reporting a depth of 14 km (8.8 miles). This is the second strong earthquake to hit this area after M6.2 at 22:21 UTC on September 24.
A strong earthquake registered by the USGS as M6.2 hit northern Venezuela at 22:21 UTC (18:21 local time) on September 25, 2025. The agency is reporting a depth of 8 km (5 miles). EMSC is reporting the same magnitude and depth. The USGS issued a Yellow alert for shaking-related fatalities and economic losses.
