Written by on . Last updated March 3rd, 2024.

Under land 1 miles from San Bernardino in The United States, a shallow M4.2 earthquake occurred in the evening of Wednesday January 24th, 2024. The earthquake struck near a very densely populated region. The USGS has indicated there is a potential risk at tsunami's following this earthquake. Mexico is also near its epicenter.

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Earthquake Summary

The earthquake struck on land in The United States, 1 miles (2 km) west of San Bernardino in California. 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: Jan 24, 2024 07:43PM (Los Angeles Time)
- Jan 25, 2024 03:43 Universal Time.
Location: 1 mi west of San Bernardino, California, The United States.
Coordinates 34°6'42"N 117°18'41"W.
Map: Map of area around epicenter.
Map of area around epicenter. Click to open in Google Maps.
Magnitude: MAG 4.2
Detected by 44 stations. Maximum Error Range ±0.2 .
Depth: 10 mi (16 km)
A very shallow depth.
Max. Intensity:
V
Moderate

On the Modified Mercalli Scale.
Tsunami Risk: Potential tsunami risk
The USGS has indicated there is a potential risk at tsunami's following this earthquake.
Always stay cautious - More info here.

Potential 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.

There is a potential tsunami risk in the aftermath of this earthquake, immediately evacuate to higher grounds away from coastal areas and monitor advice from local authorities. The US Geographic Survey organization has indicated a potential risk for tsunami's following this earthquake.

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 Not this earthquake.
This earthquake appears to have struck on land far from any coast.
Not this earthquake.
This earthquake had a magnitude of 4.2. Earthquakes of this strength are unlikely to trigger a tsunami.
This earthquake occurred at a depth of of 10 mi (16 km). Earthquakes this shallow could trigger a tsunami.

Minimal impact predicted

Based on scientific estimates by the US Geographic Survey (USGS), the risk of high fatalities for this earthquake is classified at level GREEN (low). They expect an 65% likelyhood of between 0 and 1 fatalities, and a 96% chance that the number of fatalities falls no higher than 10.

The USGS classifies the economic impact of this earthquake at level GREEN (low). They expect an 65% likelyhood of between 0 and 1 million US Dollars in economic damage and impact, and a 96% chance that the economic impact of this earthquake falls no higher than 10 million USD.

Roughly 23 million people exposed to shaking

The USGS has published a report estimating the number of people exposed to this earthquake. Acoording to their analysis, roughly 23 million have been exposed to shaking at an MMI level of II or higher.

The highest earthquake impact level for this earthquake is IV, which corresponds with light shaking and likely no damage. Roughly 1,863,000 people are expected to be exposed to this level. The majority of people (roughly 15 million) live in an area exposed to level II, where very weak shaking and no damage is expected. All exposure to shaking was within the borders of Mexico .

People MMI Level Shaking Damage
3,929,000
I
Not noticable None
14,530,000
II
Very weak None
6,852,000
III
Weak Probably none
1,863,000
IV
Light Likely none
0
V
Moderate Very light
0
VI
Strong Light
0
VII
Very Strong Moderate
0
VIII
Severe Moderate to heavy
0
IX
Violent Heavy
0
X
Extreme Very heavy

Nearby towns and cities

2 countries can be found within 300km of the epicenter of this earthquake: The United States and Mexico .

Located 1 miles (2 km) west of the epicenter of this earthquake, San Bernardino (California, The United States) is the nearest significant population center. San Bernardino experienced an earthquake intensity (MMI Scale) of roughly IV. That level implies light shaking and likely no damage.

Multiple large cities are in proximity of today's earthquake. San Bernardino is located 1 mi to the east and experienced an intensity of IV (light shaking, likely no damage). Los Angeles is located 53 mi to the west and experienced an intensity of III (weak shaking, probably no damage). Rialto is located 3 mi to the west and experienced an intensity of IV (light shaking, likely no damage).

An overview of nearby towns and cities is available in the overview below. If places don't have intensity data available, it likely means the experienced impact in those places was fairly small.

Overview of nearby places

Distance Place Intensity (MMI)
1 mi (2 km)
E from epicenter
San Bernardino

California, The United States.
IV
Light
2 mi (4 km)
S from epicenter
Colton

California, The United States.
IV
Light
3 mi (5 km)
W from epicenter
Rialto

California, The United States.
IV
Light
5 mi (8 km)
SE from epicenter
Loma Linda

California, The United States.
IV
Light
6 mi (9 km)
WSW from epicenter
Bloomington

California, The United States.
IV
Light
6 mi (10 km)
ENE from epicenter
Highland

California, The United States.
IV
Light
7 mi (12 km)
W from epicenter
Fontana

California, The United States.
IV
Light
8 mi (13 km)
ESE from epicenter
Redlands

California, The United States.
IV
Light
9 mi (15 km)
SW from epicenter
Rubidoux

California, The United States.
IV
Light
12 mi (19 km)
SW from epicenter
Glen Avon

California, The United States.
IV
Light
12 mi (19 km)
SSW from epicenter
Riverside

California, The United States.
IV
Light
13 mi (21 km)
SSE from epicenter
Moreno Valley

California, The United States.
IV
Light
14 mi (23 km)
SW from epicenter
Jurupa Valley

California, The United States.
IV
Light
16 mi (26 km)
ESE from epicenter
Yucaipa

California, The United States.
III
Weak
16 mi (26 km)
W from epicenter
Rancho Cucamonga

California, The United States.
IV
Light
18 mi (29 km)
SW from epicenter
Eastvale

California, The United States.
IV
Light
19 mi (30 km)
SW from epicenter
Norco

California, The United States.
IV
Light
19 mi (31 km)
W from epicenter
Upland

California, The United States.
IV
Light
20 mi (32 km)
W from epicenter
Ontario

California, The United States.
IV
Light
22 mi (35 km)
SW from epicenter
Corona

California, The United States.
III
Weak
22 mi (35 km)
N from epicenter
Hesperia

California, The United States.
III
Weak
22 mi (35 km)
W from epicenter
Montclair

California, The United States.
III
Weak
22 mi (36 km)
WSW from epicenter
Chino

California, The United States.
III
Weak
23 mi (37 km)
SSE from epicenter
Perris

California, The United States.
IV
Light
23 mi (37 km)
ESE from epicenter
Beaumont

California, The United States.
III
Weak
24 mi (38 km)
W from epicenter
Claremont

California, The United States.
III
Weak
25 mi (41 km)
W from epicenter
Pomona

California, The United States.
III
Weak
27 mi (43 km)
WSW from epicenter
Chino Hills

California, The United States.
III
Weak
28 mi (45 km)
SSE from epicenter
Menifee

California, The United States.
III
Weak
28 mi (45 km)
NNE from epicenter
Apple Valley

California, The United States.
III
Weak
29 mi (47 km)
N from epicenter
Victorville

California, The United States.
III
Weak
29 mi (47 km)
WSW from epicenter
Diamond Bar

California, The United States.
III
Weak
30 mi (49 km)
S from epicenter
Lake Elsinore

California, The United States.
III
Weak
32 mi (51 km)
SE from epicenter
Hemet

California, The United States.
III
Weak
32 mi (52 km)
WSW from epicenter
Yorba Linda

California, The United States.
III
Weak
36 mi (58 km)
W from epicenter
West Covina

California, The United States.
III
Weak
39 mi (62 km)
SW from epicenter
Orange

California, The United States.
II
Weak
39 mi (63 km)
WSW from epicenter
Fullerton

California, The United States.
II
Weak
39 mi (63 km)
S from epicenter
Murrieta

California, The United States.
III
Weak
40 mi (64 km)
WSW from epicenter
Anaheim

California, The United States.
II
Weak
41 mi (66 km)
SSW from epicenter
Mission Viejo

California, The United States.
II
Weak
41 mi (66 km)
SW from epicenter
Santa Ana

California, The United States.
II
Weak
41 mi (66 km)
W from epicenter
El Monte

California, The United States.
III
Weak
42 mi (68 km)
SW from epicenter
Irvine

California, The United States.
III
Weak
43 mi (69 km)
WSW from epicenter
Garden Grove

California, The United States.
II
Weak
43 mi (70 km)
SSE from epicenter
Temecula

California, The United States.
III
Weak
48 mi (77 km)
W from epicenter
Pasadena

California, The United States.
III
Weak
50 mi (81 km)
SW from epicenter
Huntington Beach

California, The United States.
II
Weak
53 mi (86 km)
W from epicenter
Los Angeles

California, The United States.
III
Weak
54 mi (87 km)
W from epicenter
Glendale

California, The United States.
II
Weak
56 mi (90 km)
WSW from epicenter
Long Beach

California, The United States.
II
Weak
181 km (112 mi)
S from epicenter
Tijuana

Baja California, Mexico.
I
Not felt
182 mi (293 km)
ESE from epicenter
Yuma

Arizona, The United States.
184 mi (296 km)
NE from epicenter
Paradise

Nevada, The United States.
299 km (186 mi)
SE from epicenter
San Luis Río Colorado

Sonora, Mexico.
Cities and Towns around the epicenter of this earthquake.

Earthquake Intensity Map

The graph below overlays a map of the region around the epicenter with earthquake intensity data provided by the US Geographic Survey. The highest intensity level detected for this earthquake is V.

I Not felt
II Weak
III Weak
IV Light
V Moderate
VI Strong
VII Very Strong
VIII Severe
IX Violent
X Extreme
Earthquake Intensity Map based on Shakemap Data provided by USGS.

Risk of aftershocks?

We monitor for foreshocks or aftershocks that have a magnitude of 2.5+ and occur within 100km (62 mi) of the epicenter of this earthquake. So far no such earthquakes have been detected.

Earthquakes can create aftershocks. These are generally at least 1 magnitude lower than any main shock, and as time passes the chance and strength of aftershocks decreases.

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 January 15th, 2024, when a 4.4 magnitude earthquake hit 127 mi (204 km) further south-southwest. An even stronger magnitude 7.1 earthquake struck on July 6th, 2019.

In total, 118 earthquakes with a magnitude of 4.2 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 month.

Sources

Last updated 03/03/24 03:28 (). This article contains currently available information about the earthquake and is automatically composed. We continue to update this article up to a few days after the earthquake occurred.

  1. US Geographic Society (USGS): Earthquake ci39756418
  2. European-Mediterranean Seismological Centre (EMSC): Earthquake 20240125_0000027
  3. Geonames.org: World Cities Database
  4. Google Maps: Static API
  5. Earthquakelist.org: Historic Earthquakes Database

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