In the North Pacific Ocean 260 kilometer from Dededo Village, Guam, a shallow and significant M5.1 aftershock occurred in the morning of Thursday December 25th, 2025.
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Earthquake Summary
This earthquake hit under water in the North Pacific Ocean, 229 kilometers (142 mi) off the coast of Guam, 260 kilometer 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: | Dec 25, 2025 08:37 (Guam Time) - Dec 24, 2025 22:37 Universal Time. |
|---|---|
| Location: | 260 km SW of Dededo Village, Dededo, Guam. Coordinates 11°47'16"N 143°13'49"E. |
| Map: |  Map of area around epicenter. Click to open in Google Maps. |
| Magnitude: | MAG 5.1 Detected by 13 stations. Maximum Error Range ±0.086 . |
| 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 . The closest significant population center near the earthquake is Hagåtña in Hagatna, Guam. Hagåtña is located 250 kilometer (155 mi) southwest of the epicenter.
A complete list of nearby places is included below.
Overview of nearby places
| Distance | Place |
|---|---|
| 250 km (155 mi) NE from epicenter |
Guam Government House Hagatna, Guam. |
| 250 km (155 mi) NE from epicenter |
Hagåtña Hagatna, Guam. |
| 251 km (156 mi) NE from epicenter |
Mangilao Village Mangilao, Guam. |
| 253 km (157 mi) NE from epicenter |
Tamuning Tamuning, Guam. |
| 253 km (157 mi) NE from epicenter |
Tamuning-Tumon-Harmon Village Tamuning, Guam. |
| 260 km (162 mi) NE from epicenter |
Dededo Village Dededo, Guam. |
| 265 km (165 mi) NE from epicenter |
Yigo Village Yigo, Guam. |
This is likely an aftershock
This earthquake was an aftershock. A larger mag. 5.7 earthquake struck 15 km (9 mi) east in advance of this 5.1 earthquake around 8 hrs earlier.
Overview of foreshocks and aftershocks
| Classification | Magnitude | When | Where |
|---|---|---|---|
| Main Shock | M 5.7 |
Dec 25, 2025 01:00 (Guam Time) | - |
| Aftershock This Earthquake |
M 5.1 |
8 hrs later Dec 25, 2025 08:37 (Guam Time) | 15 km (9 mi) W from 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. In total, 62 earthquakes with a magnitude of 5.1 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 2 months.
Low tsunami risk
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 5.1. 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 08/01/26 00:18 (). 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.
- US Geographic Society (USGS): Earthquake us7000rkmf
- European-Mediterranean Seismological Centre (EMSC): Earthquake 20251224_0000340
- Geonames.org: World Cities Database
- Google Maps: Static API
- Earthquakelist.org: Historic Earthquakes Database
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