4.8

M4.8 Earthquake near northern Mid-Atlantic Ridge — March 14, 2024

2024-03-14 21:01:21 UTC (2024-03-14) · approx. 6:01 PM UTC-3 local

Aftershock of the M5.4 mainshock.

MagnitudeM4.8(mb)
Time21:01 UTC≈ 6:01 PM UTC-3
Depth10.0 kmshallow crustal
Coordinates29.524°, -42.817°
Felt byNo felt reports
Status✓ Reviewed by USGS

On March 14, 2024 at 21:01 UTC, a magnitude 4.8 shallow crustal earthquake struck near northern Mid-Atlantic Ridge, at a depth of 10.0 km and coordinates 29.5241°, -42.8174°. This earthquake was detected by 67 seismic stations with good location accuracy and was assigned a USGS significance rating of 354, placing it among routine seismic activity.

Physical scale: An earthquake of magnitude 4.8 releases seismic energy equivalent to roughly 239 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.2 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 5.4 mainshock that occurred 13 days ago near northern Mid-Atlantic Ridge. 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 29.52°, -42.82°

Earthquake Details

Magnitude
4.8 mb
Depth
10.0 km
shallow crustal
Location
29.5241°N
-42.8174°E

Technical Information

Event ID
us6000miy5
Event Type
earthquake
Status
✓ Reviewed
Significance
354
Stations Used
67
Azimuthal Gap
133.0°
Min Station Distance
21.855°
RMS Residual
0.89 sec
Last Updated
2024-05-18 21:22:57 UTC

Common Questions

How strong was the magnitude 4.8 earthquake near northern Mid-Atlantic Ridge?

The magnitude 4.8 earthquake that struck near northern Mid-Atlantic Ridge on March 14, 2024 at 21:01 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 29.5241°, -42.8174°, which is near northern Mid-Atlantic Ridge.

Were there aftershocks?

Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.8 earthquakes can continue for several days and gradually diminish over time.

Is this the same earthquake as the M5.4 one earlier?

No. This magnitude 4.8 earthquake is an aftershock of the larger magnitude 5.4 mainshock that occurred earlier near northern 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: us6000miy5). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2024, March 14, 2024). M4.8 Earthquake near northern Mid-Atlantic Ridge — March 14, 2024. Retrieved May 18, 2024 from https://www.earthquaketracker.org/earthquakes/event/us6000miy5/