Alerts

Popocatépetl Volcano Volcanic Ash Advisory: NEW VA EMS to 19000 ft (5800 m)

Published: 4 July 2025
Categories: Global Volcano Activity

RSS feed source: USGS Earthquake Hazards Program

Background:

Volcán Popocatépetl, whose name is the Aztec word for smoking mountain, towers to 5426 m 70 km SE of Mexico City to form North America’s 2nd-highest volcano.  The glacier-clad stratovolcano contains a steep-walled, 250-450 m deep crater.  The generally symmetrical volcano is modified by the sharp-peaked Ventorrillo on the NW, a remnant of an earlier volcano. 
At least three previous major cones were destroyed by gravitational failure during the Pleistocene, producing massive debris-avalanche deposits covering broad areas south of the volcano.  The modern volcano was constructed to the south of the late-Pleistocene to Holocene El Fraile cone.  Three major plinian eruptions, the most recent of which took place about 800 AD, have occurred from Popocatépetl since the mid Holocene, accompanied by pyroclastic flows and voluminous lahars that swept basins below the volcano.  Frequent historical eruptions, first recorded in Aztec codices, have occurred since precolumbian

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Green alert for tropical cyclone THREE-25. Population affected by Category 1 (120 km/h) wind speeds or higher is 0 (0 in Tropical Storm).

Published: 4 July 2025
Categories: Global Disaster Alerts

RSS feed source: USGS Earthquake Hazards Program

From 04/07/2025 to 04/07/2025, a Tropical Depression (maximum wind speed of 65 km/h) THREE-25 was active in Atlantic. The cyclone affects these countries: United States (vulnerability Low). Estimated population affected by category 1 (120 km/h) wind speeds or higher is 0 (0 in tropical storm).

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