4.5

M4.5 Earthquake in the Maug Islands region, Northern Mariana Islands — March 26, 2021

2021-03-26 19:36:51 UTC (2021-03-26) · approx. 5:36 AM UTC+10 local

MagnitudeM4.5(mb)
Time19:36 UTC≈ 5:36 AM UTC+10
Depth104.3 kmintermediate depth
Coordinates19.122°, 145.849°
Felt byNo felt reports
Status✓ Reviewed by USGS

On March 26, 2021 at 19:36 UTC, a magnitude 4.5 intermediate depth earthquake struck in the Maug Islands region, Northern Mariana Islands, at a depth of 104.3 km and coordinates 19.1219°, 145.8487°.

Physical scale: An earthquake of magnitude 4.5 releases seismic energy equivalent to roughly 85 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 767 m — a useful intuition for the size of the slip patch on the fault.

Map showing earthquake epicenter at 19.12°, 145.85°

Earthquake Details

Magnitude
4.5 mb
Depth
104.3 km
intermediate depth
Location
19.1219°N
145.8487°E

Technical Information

Event ID
us6000dy9c
Event Type
earthquake
Status
✓ Reviewed
Significance
312
Azimuthal Gap
79.0°
Min Station Distance
5.581°
RMS Residual
0.66 sec
Last Updated
2021-06-08 17:59:43 UTC

Common Questions

How strong was the magnitude 4.5 earthquake in the Maug Islands region, Northern Mariana Islands?

The magnitude 4.5 earthquake that struck in the Maug Islands region, Northern Mariana Islands on March 26, 2021 at 19:36 UTC had a depth of 104.3 km. For context, this was a light earthquake commonly felt near the epicenter.

Where did the earthquake occur?

The earthquake epicenter was located at 19.1219°, 145.8487°, which is in the Maug Islands region, Northern Mariana Islands.

Were there aftershocks?

Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.5 earthquakes can continue for several days and gradually diminish over time.

Authoritative source: USGS event page (event ID: us6000dy9c). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2021, March 26, 2021). M4.5 Earthquake in the Maug Islands region, Northern Mariana Islands — March 26, 2021. Retrieved June 8, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000dy9c/