Around 6 to 7 million m3 (212 to 247 million ft3) of magma have accumulated beneath Svartsengi, Iceland since the eruption on July 16, 2025. At the current rate of accumulation, the estimated threshold of 12 million m3 (424 million ft3) could be reached in the latter half of September, increasing the likelihood of a new eruption.
Hurricane Lorena weakened into a tropical storm on September 4, 2025, after bringing heavy rains and flooding to Los Cabos, Mexico. The storm, though no longer expected to make landfall, is still going to bring life-threatening flood conditions to Baja California Sur, Sonora, and parts of the southwestern United States.
Antarctic iceberg A23a, which calved from the Filchner-Ronne Ice Shelf in 1986, is rapidly breaking apart in the South Atlantic as of early September 2025, leaving fragments up to 400 km2 (154 mi2) adrift.
A moderate earthquake registered by the USGS as M5.9 hit the Chile–Argentina border region at 04:10 UTC on September 4, 2025. The agency reported a depth of 176 km (109 miles). EMSC is reporting the same magnitude and depth.
A shallow earthquake registered by the USGS as M6.0 hit Fox Islands, Aleutian Islands, Alaska at 20:57 UTC on September 3, 2025. The agency is reporting a depth of 10 km (6.2 miles).
The 6-5 Fire, part of the TCU September Lightning Complex, has burned more than 2 400 ha (6 000 acres) in Tuolumne County, California, since igniting on September 2, 2025, destroying at least five homes in the historic settlement of Chinese Camp and forcing evacuations. Containment remains at zero percent.
A strong cold front is sweeping southeast across the Great Lakes, Upper Midwest, and central Plains on September 3, 2025, bringing temperatures up to 25°C (45°F) below seasonal averages and triggering strong to severe thunderstorms.
Hurricane Lorena formed in the eastern Pacific on September 3, 2025, as the 7th hurricane of the 2025 eastern Pacific hurricane season. Tropical storm warnings have been issued for parts of Baja California peninsula where the storm is expected to make a landfall later in the week.
Episode 32 of the Halemaʻumaʻu eruption at Kīlauea volcano, Hawaii, began at 16:35 UTC (06:35 HST) on September 2, 2025, producing lava fountains up to 150 m (500 feet) high. The eruption remains confined to the summit crater within Hawai‘i Volcanoes National Park.
Tropical Lorena formed in eastern Pacific on September 2, 2025, as the 12th named storm of the 2025 eastern Pacific hurricane season. The storm is forecast to reach hurricane strength before weakening and making landfall in Baja California.
