4.6

M4.6 Earthquake 56 km WSW of Merizo Village, Guam — September 14, 2024

2024-09-14 11:46:19 UTC (2024-09-14) · approx. 9:46 PM UTC+10 local

Aftershock of the M5.0 mainshock.

MagnitudeM4.6(mb)
Time11:46 UTC≈ 9:46 PM UTC+10
Depth9.6 kmshallow crustal
Coordinates13.083°, 144.186°
Felt byNo felt reports
Status✓ Reviewed by USGS

On September 14, 2024 at 11:46 UTC, a magnitude 4.6 shallow crustal earthquake struck 56 km WSW of Merizo Village, Guam, at a depth of 9.6 km and coordinates 13.0834°, 144.1863°. This earthquake was detected by 31 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 326, placing it among routine seismic activity.

Physical scale: An earthquake of magnitude 4.6 releases seismic energy equivalent to roughly 120 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 899 m — a useful intuition for the size of the slip patch on the fault.

This earthquake is part of an ongoing aftershock sequence following the magnitude 5.0 mainshock that occurred 18 days ago 58 km SSW of Merizo Village, Guam. Since the mainshock, the USGS has recorded 0 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.

Map showing earthquake epicenter at 13.08°, 144.19°

Earthquake Details

Magnitude
4.6 mb
Depth
9.6 km
shallow crustal
Location
13.0834°N
144.1863°E

Technical Information

Event ID
us6000nz0b
Event Type
earthquake
Status
✓ Reviewed
Significance
326
Stations Used
31
Azimuthal Gap
66.0°
Min Station Distance
2.645°
RMS Residual
0.92 sec
Last Updated
2024-11-21 22:58:54 UTC

Common Questions

How strong was the magnitude 4.6 earthquake near Merizo Village, Guam?

The magnitude 4.6 earthquake that struck 56 km WSW of Merizo Village, Guam on September 14, 2024 at 11:46 UTC had a depth of 9.6 km. For context, this was a light earthquake commonly felt near the epicenter.

Where did the earthquake occur?

The earthquake epicenter was located at 13.0834°, 144.1863°, which is 56 km WSW of Merizo Village, Guam.

Were there aftershocks?

Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.6 earthquakes can continue for several days and gradually diminish over time.

Is this the same earthquake as the M5.0 one earlier?

No. This magnitude 4.6 earthquake is an aftershock of the larger magnitude 5.0 mainshock that occurred earlier 58 km SSW of Merizo Village, Guam. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.

Actions

View on USGSDid You Feel It?

Authoritative source: USGS event page (event ID: us6000nz0b). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2024, September 14, 2024). M4.6 Earthquake 56 km WSW of Merizo Village, Guam — September 14, 2024. Retrieved November 21, 2024 from https://www.earthquaketracker.org/earthquakes/event/us6000nz0b/