Shallow M4.0 AFTERSHOCK hit near San Diego in The United States on Monday Morning.

Written by Earthquakelist.org on April 14th, 2025. Last updated April 27th, 2025.

In the morning of Monday April 14th, 2025, a shallow MAG-4.0 aftershock hit under land 40 miles from San Diego in The United States. The earthquake struck near a very densely populated region. Another country near the epicenter is Mexico.

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Earthquake Summary

The earthquake struck on land in The United States, 40 miles (65 km) north-east of San Diego in California. The center of this earthquake had a very shallow depth of 8 km. Shallow earthquakes usually have a larger impact than earthquakes deep in the earth.

Date and Time:	Apr 14, 2025 11:23AM (Los Angeles Time) - Apr 14, 2025 18:23 Universal Time.
Location:	40 mi NE of San Diego, California, The United States. Coordinates 33°2'26"N 116°35'32"W.
Map:	Map of area around epicenter. Click to open in Google Maps.
Magnitude:	MAG 4.0 Detected by 136 stations. Maximum Error Range ±0.031 .
Depth:	8 mi (13 km) A very shallow depth.
Max. Intensity:	IV Light On the Modified Mercalli Scale.
Tsunami Risk:	Tsunami very unlikely While this was a shallow earthquake, it appears to have occurred under land with a magnitude not strong enough to cause tsunami's. Always stay cautious - More info here.

Nearby towns and cities

The United States and Mexico are both located within 300km distance of the epicenter of the earthquake.

Located 16 miles (26 km) east of the epicenter of this earthquake, Ramona (California, The United States) is the nearest significant population center. The intensity of shaking and damage in Ramona is estimated to be around level IV on the Modified Mercalli Intensity scale (light shaking, likely no damage).

Major cities near this earthquake: San Diego is located 40 mi to the southwest and experienced an intensity of II (very weak shaking, no damage). Los Angeles is located 118 mi to the northwest and experienced an intensity of I (not noticeable, no damage). Tijuana is located 71 km to the south-southwest and experienced an intensity of II (very weak shaking, no damage).

A complete list of nearby places is included below. Estimated intensity data (MMI) sourced from a shake-map published by the US Geographic Survey is shown where available (cities without data probably experienced little impact).

Overview of nearby places

Earthquake Intensity Map

The maximum intensity (MMI Scale) caused by this earthquake is IV. The map below shows in which areas this earthquake was the most and least impactful. It is based on data from the US Geographic Survey.

I Not felt

II Weak

III Weak

IV Light

V Moderate

VI Strong

VII Very Strong

VIII Severe

IX Violent

X Extreme

This is likely an aftershock

Approximately 1 hr before this earthquake hit, a larger 5.2 magnitude earthquake struck 0.4 mi (0.6 km) south-southwest of this one. For that reason, we classify the Mag. 4.0 earthquake as an aftershock.

Overview of foreshocks and aftershocks

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.

Earthquakes like this happen often in the region

Earthquakes of this strength are very common in the region. In total, 198 earthquakes with a magnitude of 4 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 18 days.

Tsunami very unlikely

While MAG-6.5+ earthquakes may cause tsunami's, it appears that the epicenter of this earthquake hit under land. In addition, the reported depth is deeper than 100km, making the risk of a tsunami even less likely. However always stay cautious and monitor advice from local authorities.

Tsunami Risk Factors

Sources

Last updated 27/04/25 19:48 (). This article is automatically generated based on available data. We keep checking multiple sources for additional information. This article gets updated as new details on this earthquake become available.

1. US Geographic Society (USGS): Earthquake ci40926623
2. European-Mediterranean Seismological Centre (EMSC): Earthquake 20250414_0000215
3. Geonames.org: World Cities Database
4. Google Maps: Static API
5. Earthquakelist.org: Historic Earthquakes Database

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