Phivolcs Releases Bulletin About the Magnitude 4.2 Earthquake Off Calayan, Cagayan, November 2, 2026
EARTHQUAKE – A magnitude 4.2 earthquake struck off Calayan, Cagayan on Monday afternoon, November 2, 2026, according to the Philippine Institute of Volcanology and Seismology (Phivolcs). Here are the details.
Based on Earthquake Information No. 1 released by Phivolcs, the tremor was recorded at 4:42 in the afternoon. Its epicenter was located at 19.69°N, 121.18°E, or about 57 kilometers North 33° West of Calayan in the province of Cagayan.
The quake was tectonic in origin and had a depth of focus of 16 kilometers. Phivolcs measured it at magnitude 4.2 (Ms). The bulletin did not list any reported intensities.
Phivolcs said it does not expect damage nor aftershocks from the said quake. The agency added that this would be the only bulletin issued for the event unless additional information becomes available.
Other Quakes Recorded Near Calayan Today
The magnitude 4.2 tremor was the strongest among several quakes that the Phivolcs latest earthquake list logged in the waters around the Calayan island group on Monday. These include:
- Magnitude 2.8 – 4:34 AM, 21 km South 39° West of Dalupiri Island (Calayan)
- Magnitude 2.0 – 10:38 AM, 8 km South 36° West of Calayan
- Magnitude 2.8 – 11:48 AM, 67 km North 17° West of Dalupiri Island (Calayan)
- Magnitude 2.7 – 4:47 PM, 58 km North 37° West of Calayan
- Magnitude 2.1 – 4:56 PM, 28 km North 41° West of Calayan
- Magnitude 2.8 – 5:00 PM, 60 km North 55° West of Babuyan Island (Calayan)
Last month, a magnitude 4.6 earthquake also hit the same area off Calayan, Cagayan.
A tectonic earthquake happens when rocks in the Earth’s crust suddenly break and move along a fault because of the stress that builds up between them. The Philippines experiences many of these because it sits along the Pacific “Ring of Fire” and has numerous active faults and trenches.
Earthquakes cannot be accurately predicted, which is why agencies like Phivolcs continuously monitor seismic activity across the country and issue advisories when needed. Quakes that happen offshore are also watched closely because strong ones can trigger tsunamis.
To stay safe, it is important to know what to do before, during and after a quake. Have you read these earthquake safety tips?
