Alerts

Popocatépetl Volcano Volcanic Ash Advisory: PSBL LGT VA EM

Published: 4 October 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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Moderate 4.9 quake hits near Laoag, Ilocos Norte, Ilocos, Philippines

Published: 4 October 2025
Categories: Global Earthquake Activity

RSS feed source: USGS Earthquake Hazards Program

Sun, 5 Oct 2025, 01:55 | BY: EARTHQUAKEMONITOR

A magnitude 4.9 earthquake near Laoag, Ilocos Norte, Ilocos, Philippines, was reported only 8 minutes ago by the German Research Centre for Geosciences (GFZ), considered one of the key international agencies that monitor seismic activity worldwide. The earthquake occurred at a shallow depth of 10. km beneath the epicenter in the morning on Sunday, October 5th, 2025, at 9:45 am local time. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
Our monitoring service identified a second report from the citizen-seismograph network of RaspberryShake which listed the quake at magnitude 4.9 as well.
Based on the preliminary seismic data, the quake should not have caused any significant damage, but was probably felt by many people as light vibration in the area of the epicenter.
Weak shaking might have been felt in Callaguip (pop. 2,100) located 72 km from the epicenter, Batac City (pop. 55,500) 81 km away, Laoag (pop. 102,100) 81 km away, San Nicolas (pop. 34,200) 81 km away, Bacarra (pop. 9,600) 83 km away, Cabugao (pop. 6,900) 84 km away, Pasuquin (pop. 5,800) 84 km away, Bantay (pop. 10,100) 95 km away, and Vigan (pop. 48,500) 95 km away.
VolcanoDiscovery

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