4.9

M4.9 Earthquake near central Mid-Atlantic Ridge — January 25, 2024

2024-01-25 02:36:42 UTC (2024-01-25) · approx. 11:36 PM UTC-3 local

Felt by 1 person across nearby locations. Aftershock of the M5.1 mainshock.

MagnitudeM4.9(mb)
Time02:36 UTC≈ 11:36 PM UTC-3
Depth10.0 kmshallow crustal
Coordinates8.503°, -39.568°
Felt by1DYFI response
Status✓ Reviewed by USGS

On January 25, 2024 at 02:36 UTC, a magnitude 4.9 shallow crustal earthquake struck near central Mid-Atlantic Ridge, at a depth of 10.0 km and coordinates 8.5028°, -39.5683°. This earthquake was detected by 130 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.

This earthquake is part of an ongoing aftershock sequence following the magnitude 5.1 mainshock that occurred 26 days ago near central Mid-Atlantic Ridge. Since the mainshock, the USGS has recorded 1 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 8.50°, -39.57°

Did You Feel It? — community-reported shaking

Aggregated felt-report intensity from 1 citizen response to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.

USGS DYFI community-reported intensity map for the M4.9 earthquake near central Mid-Atlantic Ridge

Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report

Earthquake Details

Magnitude
4.9 mb
Depth
10.0 km
shallow crustal
Location
8.5028°N
-39.5683°E
Felt Reports
1
DYFI responses
Community Intensity
0.0
CDI from reports

Technical Information

Event ID
us7000ltm3
Event Type
earthquake
Status
✓ Reviewed
Significance
369
Stations Used
130
Azimuthal Gap
74.0°
Min Station Distance
14.697°
RMS Residual
0.65 sec
Last Updated
2024-03-30 22:33:24 UTC

Common Questions

How strong was the magnitude 4.9 earthquake near central Mid-Atlantic Ridge?

The magnitude 4.9 earthquake that struck near central Mid-Atlantic Ridge on January 25, 2024 at 02:36 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.

Where did the earthquake occur?

The earthquake epicenter was located at 8.5028°, -39.5683°, which is near central Mid-Atlantic Ridge.

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.

Is this the same earthquake as the M5.1 one earlier?

No. This magnitude 4.9 earthquake is an aftershock of the larger magnitude 5.1 mainshock that occurred earlier near central Mid-Atlantic Ridge. 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: us7000ltm3). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2024, January 25, 2024). M4.9 Earthquake near central Mid-Atlantic Ridge — January 25, 2024. Retrieved March 30, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000ltm3/