Written by on . Last updated April 17th, 2024.

A shallow and significant MAG-5.2 earthquake struck in the North Pacific Ocean 186 kilometer from Dededo Village, Guam around noon of Monday March 25th, 2024.

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Earthquake Summary

This earthquake hit under water in the North Pacific Ocean, 153 kilometers (95 mi) off the coast of Guam, 186 kilometer south-southwest of Dededo Village in Dededo. The center of this earthquake had a very shallow depth of 10 km. Shallow earthquakes usually have a larger impact than earthquakes deep in the earth.

Date and Time: Mar 25, 2024 12:21 (Guam Time)
- Mar 25, 2024 02:21 Universal Time.
Location: 186 km SSW of Dededo Village, Dededo, Guam.
Coordinates 12°5'42"N 143°56'10"E.
Map: Map of area around epicenter.
Map of area around epicenter. Click to open in Google Maps.
Magnitude: MAG 5.2
Detected by 185 stations. Maximum Error Range ±0.042 .
Depth: 10 km (6 mi)
A very shallow depth.
Tsunami Risk: Low tsunami risk
Earthquakes under MAG-6.5 do not usually cause tsunami's.
Always stay cautious - More info here.

Nearby towns and cities

This earthquake may have been felt in Guam . Mangilao Village in Mangilao, Guam is the nearest significant place from the epicenter. The earthquake occurred 177 kilometer (110 mi) south-southwest of Mangilao Village.

A complete list of nearby places is included below.

Overview of nearby places

Distance Place
177 km (110 mi)
NNE from epicenter
Mangilao Village

Mangilao, Guam.
177 km (110 mi)
NNE from epicenter
Hagåtña

Hagatna, Guam.
177 km (110 mi)
NNE from epicenter
Guam Government House

Hagatna, Guam.
180 km (112 mi)
NNE from epicenter
Tamuning

Tamuning, Guam.
180 km (112 mi)
NNE from epicenter
Tamuning-Tumon-Harmon Village

Tamuning, Guam.
186 km (116 mi)
NNE from epicenter
Dededo Village

Dededo, Guam.
191 km (119 mi)
NNE from epicenter
Yigo Village

Yigo, Guam.
Cities and Towns around the epicenter of this earthquake.

Aftershocks detected

After this earthquake struck, 1 smaller aftershock occurred. A 4.5 magnitude earthquake hit 2 days later 18 km (11 mi) east of this earthquake.

Overview of foreshocks and aftershocks

Classification Magnitude When Where
Main Shock
This Earthquake
M 5.2 Mar 25, 2024 12:21
(Guam Time)
-
Aftershock M 4.5 2 days later
Mar 27, 2024 03:40 (Guam Time)
18 km (11 mi)
E from Main Shock.
Detected MAG2.5+ earthquakes within within 100km (62 mi), that occurred in the three days before and after the main shock.

More earthquakes coming?

Aftershocks are usually at least 1 order of magnitude less strong than main shocks. The more time passes, the smaller the chance and likely strength of any potential aftershocks.

In only six percent of cases, significant earthquakes are followed by a larger main shock, making the current earthquake a foreshock. While the chance of this happening is not so large, it is adviced to maintain cautiousness in the hours and days following a major earthquake.

Read: How to Stay Safe during an Earthquake (cdc.gov).

Earthquakes like this happen often in the region

Earthquakes of this strength are very common in the region. This is the strongest earthquake to hit since February 4th, 2024, when a 5.4 magnitude earthquake hit 56 km (35 mi) further northwest. An even stronger magnitude 6.7 earthquake struck on September 17th, 2014.

In total, 39 earthquakes with a magnitude of 5.2 or higher have been registered within 300km (186 mi) of this epicenter in the past 10 years. This comes down to an average of once every 3 months.

Low tsunami risk

DISCLAIMER: We strongly suggest to closely monitor advice from local authorities with regards to tsunami risks. Our analysis is based on automatically collected data from external sources, and these might contain mistakes. In addition, earthquakes can cause landslides that may lead to a tsunami, or be a followed by another, potentially stonger, earthquake.

Based on early data it appears this earthquake was not strong enough (lower than MAG-6.5) to be likely to cause destructive tsunami's. However this earthquake appeared to have hit at a shallow depth under sea, so stay cautious and monitor advice from local authorities.

Tsunami Risk Factors

Factor Under Sea? MAG-6.5 or stronger? Shallow depth?
Explanation Almost all tsunami's are caused by earthquakes with their epicenter under sea or very near the sea. However stay cautious in coastal areas as earthquakes on land may cause landslides into sea, potentially still causing a local tsunami. Under MAG 6.5: Very unlikely to cause a tsunami.
MAG 6.5 to 7.5: Destructive tsunami's do occur, but are uncommon. Likely to observe small sea level changes.
MAG 7.6+: Earthquakes with these magnitudes might produce destructive tsunami's.
Most destructive tsunami's are caused by shallow earthquakes with a depth between 0 and 100km under the surface of the earth. Deeper tsunami's are unlikely to displace to ocean floor.
This Earthquake This earthquake appears to have struck under the sea. Not this earthquake.
This earthquake had a magnitude of 5.2. Earthquakes of this strength are unlikely to trigger a tsunami.
This earthquake occurred at a depth of of 10 km (6 mi). Earthquakes this shallow could trigger a tsunami.

Sources

Last updated 17/04/24 03:38 (). As more information on this earthquake becomes available this article will be updated. This article is automatically composed based on data originating from multiple sources.

  1. US Geographic Society (USGS): Earthquake us6000ml0j
  2. European-Mediterranean Seismological Centre (EMSC): Earthquake 20240325_0000025
  3. Geonames.org: World Cities Database
  4. Google Maps: Static API
  5. Earthquakelist.org: Historic Earthquakes Database

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