A powerful winter storm swept through the U.S. Northeast on December 26–27, 2025, triggering states of emergency in New Jersey and New York, dropping nearly 30 cm (12 inches) of snow and leaving over 120 000 customers without power.
A strong earthquake registered by the USGS as M6.6 hit near Yilan, Taiwan, at 15:05 UTC (23:05 local time) on December 27, 2025. The agency reported a depth of 67.5 km (42 miles). EMSC is reporting M6.6 at a depth of 68 km. No tsunami warning was issued.
Etna’s eruptive activity intensified rapidly between December 24 and 27, 2025, culminating in short-lived lava fountains about 200 m (650 feet) high and a new lava flow from the upper Voragine crater toward the Valle del Bove. INGV Etna Observatory (OE) raised the Aviation Color Code to Red on December 27 as tremor and infrasound amplitudes reached very high levels.
Winter Storm Warnings are in effect for large parts of the northeastern U.S., including New York, New Jersey, Connecticut, and Pennsylvania, from December 26 until midday December 27, 2025. Snow totals of 10–25 cm (4–10 inches) are forecast throughout warning areas, with the heaviest snowfall affecting the Friday evening commute as travel conditions deteriorate rapidly.
Multiple Ice Storm Warnings are in effect across western and central Pennsylvania from Friday, December 26, 2025, until early Saturday, December 27, 2025. Up to 8 mm (0.3 inches) of ice accumulation are forecast to create treacherous travel conditions, power outages, and tree damage.
Activity at the Piparo Mud Volcano in Trinidad and Tobago began increasing early on December 24, 2025, and continued through Christmas, ejecting mud up to 4.6 m (15 feet) into the air and damaging roads, homes, and nearby infrastructure. Officials confirmed visible cracks, ground uplift, and frequent eruptions occurring every 10–20 seconds as assessments and safety operations remained underway.
A major atmospheric river swept across Southern California from late December 24, 2025, into Christmas Day, December 25, triggering widespread flash floods, evacuations, debris flows, and power outages. Multiple counties including Los Angeles and Ventura were put under a State of Emergency. Rainfall totals reached 75–150 mm (3–6 inches) in coastal and valley areas, with up to 250 mm (10 inches) in higher terrain of Los Angeles and Ventura counties, prompting officials to urge residents to avoid travel.
New activity/unrest was reported for 4 volcanoes from December 17 to 23, 2025. During the same period, ongoing activity was reported for 19 volcanoes.
A strong and shallow earthquake registered by the USGS as M6.0 hit near Yujing, Taiwan, at 09:47 UTC (17:47 local time) on December 24, 2025. The agency reported a depth of 10 km (6.2 miles), while EMSC reported M6.0 at a depth of 12 km (7.4 miles). There is no tsunami threat from this earthquake.
Kīlauea entered eruptive episode 39 at 20:10 HST on December 23, 2025 (06:10 UTC on December 24) as lava fountains rose from twin vents on the floor of Halemaʻumaʻu crater. Within about 95 minutes, fountain heights increased from 10 m (30 feet) to more than 420 m (1 400 feet), with lava flows covering 10–20% of the crater floor by 21:14 HST and a plume reaching 6 000 m (20 000 feet).
