A major solar flare registered as X1.9 erupted from Active Region 4299 at 02:49 UTC on December 1, 2025. The event started at 02:27 and ended at 03:05 UTC. This region is currently making its second run through the Earth-side of the Sun, after producing multiple X-class flares in early November.
A large chain-reaction crash involving about 45 vehicles occurred on Interstate 70 westbound near Terre Haute, Indiana, at around 10:00 LT on November 29, 2025, amid heavy snowfall and reduced visibility. The collision blocked all westbound lanes for nearly 6 hours, but authorities reported no fatalities or major injuries. The event happened as a winter storm system brought snow and freezing rain across parts of Illinois and Indiana, creating hazardous travel conditions.
A low-pressure area developed over the Strait of Malacca on November 22, 2025, and gradually organized into Cyclonic Storm Senyar on November 26. The rare low-latitude system made landfalls in northern Sumatra and Peninsular Malaysia, producing extreme rainfall and catastrophic flooding across Indonesia, Malaysia, and southern Thailand. At least 316 people were killed and thousands displaced before Senyar weakened into a low-pressure remnant on November 28.
A powerful post-Thanksgiving winter storm is spreading across the Midwest and northern Plains on Friday, November 28, 2025, prompting widespread winter storm warnings and advisories from eastern Nebraska and Iowa through southern Minnesota and Wisconsin.
A strong and shallow earthquake registered by the USGS as M6.6 struck near Sinabang, Indonesia, at 04:56 UTC on November 27, 2025. The agency is reporting a depth of 25.4 km (15.8 miles). EMSC is reporting the same magnitude and depth. According to the Indian Ocean Tsunami Warning and Mitigation System (IOTWMS), there is a potential tsunami threat to countries bordering the Indian Ocean.
A second winter storm is forecast to follow the Thanksgiving winter storm, bringing heavy snow across the Upper Midwest starting Friday, November 28, 2025. Snowfall totals are forecast to reach more than 152 mm (6 inches) through Sunday, November 30, as the storm moves across the region.
Ash and sulfur dioxide released by Ethiopia’s Hayli Gubbi volcano, erupting for the first time in at least 12 000 years, disrupted regional air travel between November 24 and 25, 2025. The eruption produced a high-altitude plume reaching about 14 km (46 000 feet) above sea level, spreading eastward across the Arabian Peninsula and India, where aviation authorities issued advisories, rerouted long-haul flights, and temporarily suspended operations on affected routes.
Hayli Gubbi volcano in Ethiopia erupted for the first time in at least 12 000 years on November 23, 2025, marking its first confirmed Holocene activity. The eruption generated a plume rising to about 14 km (46 000 feet) above sea level before drifting toward the Arabian Peninsula. Updated satellite data from IASI-C on November 24 detected a large SO2 plume between 5 km (16 400 feet) and 17 km (55 800 feet), with a centre-of-mass height near 16 km (52 500 feet) and a total mass loading of 58.4 kt.
A sudden stratospheric warming event has begun, deforming the Polar Vortex and setting the stage for a colder start to winter across the United States, Canada, and Europe.
At least 6 deaths have been reported in Dhaka after a strong M5.5 earthquake hit Bangladesh on November 21, 2025. Tremors from the quake were felt as far as Kolkata and parts of eastern India
