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

Under land 9 miles from Thousand Oaks in The United States, a shallow Magnitude 4.6 earthquake occurred in the early afternoon of Friday February 9th, 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. Another nearby country is Mexico.

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Earthquake Summary

The earthquake struck on land in The United States, 9 miles (14 km) south-southwest of Thousand Oaks 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: Feb 9, 2024 01:47PM (Los Angeles Time)
- Feb 9, 2024 21:47 Universal Time.
Location: 9 mi SSW of Thousand Oaks, California, The United States.
Coordinates 34°3'27"N 118°54'28"W.
Map: Map of area around epicenter.
Map of area around epicenter. Click to open in Google Maps.
Magnitude: MAG 4.6
Detected by 36 stations. Maximum Error Range ±0.2 .
Depth: 10 mi (15 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 This earthquake appears to have struck on land near a coastal area (1 mi from the sea). Not this earthquake.
This earthquake had a magnitude of 4.6. Earthquakes of this strength are unlikely to trigger a tsunami.
This earthquake occurred at a depth of of 10 mi (15 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 20 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 20 million have been exposed to shaking at an MMI level of II or higher.

The highest earthquake impact level for this earthquake is V, which corresponds with moderate shaking and very light damage. Roughly 17,750 people are expected to be exposed to this level. The majority of people (roughly 12 million) live in an area exposed to level III, where weak shaking and probably no damage is expected. All exposure to shaking was within the borders of Mexico .

People MMI Level Shaking Damage
5,804,000
I
Not noticable None
6,534,000
II
Very weak None
11,780,000
III
Weak Probably none
2,025,000
IV
Light Likely none
17,750
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 .

Thousand Oaks in California, The United States is the nearest significant place from the epicenter. The earthquake occurred 9 miles (14 km) south-southwest of Thousand Oaks. Thousand Oaks experienced an earthquake intensity (MMI Scale) of roughly IV. That level implies light shaking and likely no damage.

Major cities near this earthquake: Los Angeles is located 38 mi to the east and experienced an intensity of III (weak shaking, probably no damage). Thousand Oaks is located 9 mi to the north-northeast and experienced an intensity of IV (light shaking, likely no damage). Oxnard is located 18 mi to the west-northwest and experienced an intensity of III (weak shaking, probably 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)
9 mi (14 km)
NNE from epicenter
Thousand Oaks

California, The United States.
IV
Light
9 mi (15 km)
NE from epicenter
Agoura Hills

California, The United States.
IV
Light
11 mi (18 km)
ENE from epicenter
Agoura

California, The United States.
V
Moderate
13 mi (21 km)
NW from epicenter
Camarillo

California, The United States.
IV
Light
16 mi (25 km)
N from epicenter
Moorpark

California, The United States.
IV
Light
16 mi (26 km)
NNE from epicenter
Simi Valley

California, The United States.
IV
Light
17 mi (27 km)
ENE from epicenter
Calabasas

California, The United States.
IV
Light
17 mi (28 km)
WNW from epicenter
Port Hueneme

California, The United States.
III
Weak
18 mi (29 km)
WNW from epicenter
Oxnard

California, The United States.
III
Weak
18 mi (29 km)
ENE from epicenter
West Hills

California, The United States.
IV
Light
19 mi (30 km)
ENE from epicenter
Woodland Hills

California, The United States.
IV
Light
21 mi (33 km)
ENE from epicenter
Canoga Park

California, The United States.
IV
Light
22 mi (36 km)
NNW from epicenter
Santa Paula

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

California, The United States.
IV
Light
24 mi (39 km)
E from epicenter
Santa Monica

California, The United States.
IV
Light
24 mi (39 km)
ENE from epicenter
Northridge

California, The United States.
IV
Light
24 mi (39 km)
ENE from epicenter
Encino

California, The United States.
IV
Light
26 mi (42 km)
E from epicenter
Venice

California, The United States.
IV
Light
27 mi (43 km)
NW from epicenter
Ventura

California, The United States.
III
Weak
27 mi (43 km)
ENE from epicenter
Sherman Oaks

California, The United States.
IV
Light
27 mi (44 km)
ENE from epicenter
North Hills

California, The United States.
IV
Light
28 mi (45 km)
ENE from epicenter
Van Nuys

California, The United States.
IV
Light
28 mi (45 km)
ENE from epicenter
Valley Glen

California, The United States.
IV
Light
29 mi (47 km)
E from epicenter
Culver City

California, The United States.
IV
Light
31 mi (50 km)
ENE from epicenter
North Hollywood

California, The United States.
III
Weak
31 mi (50 km)
NE from epicenter
Santa Clarita

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

California, The United States.
III
Weak
32 mi (52 km)
E from epicenter
Inglewood

California, The United States.
III
Weak
32 mi (52 km)
E from epicenter
Universal City

California, The United States.
III
Weak
33 mi (53 km)
ESE from epicenter
Redondo Beach

California, The United States.
IV
Light
34 mi (54 km)
E from epicenter
Hollywood

California, The United States.
III
Weak
34 mi (54 km)
ESE from epicenter
Hawthorne

California, The United States.
III
Weak
35 mi (56 km)
E from epicenter
Koreatown

California, The United States.
III
Weak
35 mi (57 km)
NE from epicenter
Canyon Country

California, The United States.
III
Weak
35 mi (57 km)
ENE from epicenter
Burbank

California, The United States.
III
Weak
36 mi (58 km)
ESE from epicenter
Gardena

California, The United States.
III
Weak
36 mi (58 km)
ESE from epicenter
Torrance

California, The United States.
III
Weak
38 mi (61 km)
E from epicenter
Glendale

California, The United States.
III
Weak
38 mi (61 km)
E from epicenter
Los Angeles

California, The United States.
III
Weak
39 mi (63 km)
ESE from epicenter
Carson

California, The United States.
III
Weak
40 mi (65 km)
E from epicenter
Boyle Heights

California, The United States.
III
Weak
40 mi (65 km)
E from epicenter
South Gate

California, The United States.
III
Weak
41 mi (66 km)
ESE from epicenter
Compton

California, The United States.
IV
Light
42 mi (68 km)
E from epicenter
East Los Angeles

California, The United States.
III
Weak
44 mi (71 km)
E from epicenter
Pasadena

California, The United States.
III
Weak
45 mi (73 km)
E from epicenter
Downey

California, The United States.
III
Weak
46 mi (74 km)
ESE from epicenter
Long Beach

California, The United States.
III
Weak
58 mi (93 km)
NE from epicenter
Palmdale

California, The United States.
II
Weak
59 mi (95 km)
ESE from epicenter
Garden Grove

California, The United States.
III
Weak
59 mi (95 km)
ESE from epicenter
Huntington Beach

California, The United States.
III
Weak
59 mi (95 km)
ESE from epicenter
Anaheim

California, The United States.
III
Weak
247 km (153 mi)
SE from epicenter
Tijuana

Baja California, Mexico.
I
Not felt
Cities and Towns around the epicenter of this earthquake.

Earthquake Intensity Map

The intensity in shaking and damage by this earthquake is illustrated through the map below. The highest intensity measured 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.

4 Aftershocks detected

Since this main shock, 4 smaller aftershocks were detected. At a distance of 0.2 mi (0.4 km) west of this earthquake, an aftershock struck 2 hrs later. It measured a magnitude of 3.1

Overview of foreshocks and aftershocks

Classification Magnitude When Where
Main Shock
This Earthquake
M 4.6 Feb 9, 2024 01:47PM
(Los Angeles Time)
-
Aftershock M 3.0 3 mins later
Feb 9, 2024 01:50PM (Los Angeles Time)
1 mi (1.6 km)
SSW from Main Shock.
Aftershock M 2.5 9 mins later
Feb 9, 2024 01:56PM (Los Angeles Time)
1.3 mi (2.1 km)
SE from Main Shock.
Aftershock M 2.6 1 hr later
Feb 9, 2024 02:58PM (Los Angeles Time)
0.6 mi (1 km)
ESE from Main Shock.
Aftershock M 3.1 2 hrs later
Feb 9, 2024 03:41PM (Los Angeles Time)
0.2 mi (0.4 km)
W 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?

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.

It's always adviced to be cautious of the risk of a larger shock following any significant earthquake, however this risk is fairly small. There is a roughly 94 percent change that no larger main shock will follow in the days following this 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 August 20th, 2023, when a 5.1 magnitude earthquake hit 29 mi (47 km) further northwest. An even stronger magnitude 7.1 earthquake struck on July 6th, 2019.

In total, 32 earthquakes with a magnitude of 4.6 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 4 months.

Sources

Last updated 03/03/24 00:58 (). 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 ci40664632
  2. European-Mediterranean Seismological Centre (EMSC): Earthquake 20240209_0000372
  3. Geonames.org: World Cities Database
  4. Google Maps: Static API
  5. Earthquakelist.org: Historic Earthquakes Database

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