A strong M7.4 earthquake struck near the east coast of Russia’s Kamchatka Peninsula at 02:37 UTC on September 13, 2025. The quake is aftermath of powerful, tsunami-producing M8.8 quake on July 29.
Tropical Storm Mario formed at 15:00 UTC on September 12, 2025, just off the coast of Mexico, prompting the government of Mexico to issue a Tropical Storm Watch from Lazaro Cardenas to Punta San Telmo. At the time of formation, the center of Mario was located 65 km (40 miles) SSW of Zihuatanejo and 95 km (60 miles) SSE of Lazaro Cardenas, Mexico.
A landslide struck Upper Rimbi in Sikkim on September 12, 2025, killing at least four people. Three victims from the same family died when their home was buried, while a seven-year-old girl from the family was rescued and reported safe.
A La Niña Watch was issued by NOAA’s Climate Prediction Center on September 11, 2025, with a 71% probability of La Niña forming in October–December 2025. Chances decline to 54% for December 2025–February 2026.
Weak to moderate lahars descended from Fuego volcano, Guatemala, at 19:17 LT on September 10, 2025, moving through Barranca Ceniza and into the Zarco and Mazate rivers, tributaries of the Achíguate River. The National Institute of Seismology, Volcanology, Meteorology and Hydrology (INSIVUMEH) reported that conditions remain favorable for additional lahars on the southwestern flanks.
Multiple tornadoes touched down in New South Wales on September 10, 2025, one of which destroyed the shed of a farm in Caragabal, and ripped the roof off a nearby house.
At least 25 people are confirmed dead or missing after floods and landslides struck Bali and East Nusa Tenggara, Indonesia, between September 9 and 11, 2025. Torrential rains inundated large areas, collapsed buildings, and forced the evacuation of more than 500 residents.
A sudden stratospheric warming event is unfolding over Antarctica in early September 2025, rapidly weakening the southern polar vortex. Forecast models indicate potential downstream effects on the Northern Hemisphere jet stream, with implications for winter 2025/26 in the USA and Canada.
A lightning-sparked wildfire known as Garnet Fire entered the McKinley Grove of giant ancient sequoias in California’s Sierra National Forest on September 8, 2025. Firefighters reported ember ignition in upper branches but no complete canopy burn. Containment stands at about 15% after burning 22 000 ha (55 000 acres) since igniting on August 24.
At least six people were killed after torrential rains triggered severe flooding across Bali, Indonesia, between September 9 and 10, 2025. The floods inundated large parts of Denpasar, caused the collapse of multiple buildings, and left several people missing, while hundreds were evacuated to safer areas.
