M4.9 Earthquake in the Pagan region, Northern Mariana Islands — July 23, 2026
2026-07-23 12:11:57 UTC (2 hours ago) · approx. 10:11 PM UTC+10 local
On July 23, 2026 at 12:11 UTC, a magnitude 4.9 deep-focus earthquake struck in the Pagan region, Northern Mariana Islands, at a depth of 320.6 km and coordinates 18.0675°, 145.2565°. This earthquake was detected by 83 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 369, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.9 releases seismic energy equivalent to roughly 338 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.4 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
145.2565°E
Technical Information
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Common Questions
How strong was the magnitude 4.9 earthquake in the Pagan region, Northern Mariana Islands?
The magnitude 4.9 earthquake that struck in the Pagan region, Northern Mariana Islands on July 23, 2026 at 12:11 UTC had a depth of 320.6 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 18.0675°, 145.2565°, which is in the Pagan region, Northern Mariana Islands.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.9 earthquakes can continue for several days and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us7000t2p1). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, July 23, 2026). M4.9 Earthquake in the Pagan region, Northern Mariana Islands — July 23, 2026. Retrieved July 23, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000t2p1/