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Mag. 4.9 earthquake - 41 km east of Acapulco, Guerrero, Mexico, on Tuesday, Nov 21, 2023, at 02:24 pm (Mexico City time) -

A strong magnitude 4.9 earthquake hit 41 km (25 mi) away from Acapulco, Guerrero,  Mexico, in the early afternoon of Tuesday, Nov 21, 2023 at 2.24 pm local time (America/Mexico City GMT -6). The quake had a very shallow depth of 15.9 km (10 mi) and was not felt (or at least not reported so).

Mag. 4.9 earthquake - 41 km east of Acapulco, Guerrero, Mexico, on Tuesday, Nov 21, 2023, at 02:24 pm (Mexico City time) Mag. 4.9 earthquake - 41 km east of Acapulco, Guerrero, Mexico, on Tuesday, Nov 21, 2023, at 02:24 pm (Mexico City time)

Moderate magnitude 4.9 earthquake at 16 km depth

21 Nov 20:49 UTC: First to report: SSN after 25 minutes.

Earthquake details

Date & timeNov 21, 2023 20:24:31 UTC -
Local time at epicenterTuesday, Nov 21, 2023, at 02:24 pm (America/Mexico City GMT -6)
StatusPreliminary (automatic detection)
Magnitude4.9
Depth15.9 km
Epicenter latitude / longitude16.8°N / 99.53°W San Marcos, Guerrero, Mexico
Seismic antipode16.8°S / 80.47°E
Shaking intensityModerate shaking near epicenter
Felt0 reports
Primary data sourceSSN (Servicio Sismológico Nacional)
Weather at epicenter at time of quakeOvercast Clouds 29.4°C (85 F), humidity: 69%, wind: 4 m/s (7 kts) from WSW
Estimated seismic energy released1.4 x 1012 joules (392 megawatt hours, equivalent to 338 tons of TNT) | about seismic energy
Interactive map
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Nearby places

The closest larger town where the quake might have been felt is Acapulco, a city with more than 670,000 inhabitants in Mexico, in 41 km (25 mi) distance west of the epicenter. People likely experienced light shaking there. Many smaller towns and villages are located closer to the epicenter and might have experienced stronger shaking. In the capital of  Mexico, Mexico, 295 km (184 mi) away from the epicenter, the earthquake was probably felt as very weak shaking.
The following table shows some of the places that might have been affected (or not) by the shaking.
Distance Place Max. shaking intensity(*) Region Country
1 km (1 mi)
NW of epicenter
Las Minas
(pop: 943)
V: Moderate
San Marcos, Guerrero
13 km (8 mi)
SW of epicenter
Lomas de Chapultepec
(pop: 2,170)
IV: Light
Acapulco de Juarez, Guerrero
15 km (9 mi)
W of epicenter
Amatillo
(pop: 3,300)
IV: Light
Acapulco de Juarez, Guerrero
15 km (9 mi)
E of epicenter
San Marcos
(pop: 13,300)
IV: Light
Guerrero
23 km (14 mi)
NE of epicenter
Ocotlan
(pop: 1,250)
IV: Light
Tecoanapa, Guerrero
24 km (15 mi)
N of epicenter
Las Mesas
(pop: 2,690)
IV: Light
San Marcos, Guerrero
27 km (17 mi)
E of epicenter
Rancho Viejo
(pop: 1,120)
IV: Light
San Marcos, Guerrero
27 km (17 mi)
W of epicenter
Tres Palos
(pop: 5,000)
IV: Light
Acapulco de Juarez, Guerrero
28 km (17 mi)
NW of epicenter
Dos Arroyos
(pop: 1,850)
IV: Light
Acapulco de Juarez, Guerrero
32 km (20 mi)
E of epicenter
Las Vigas
(pop: 4,500)
IV: Light
San Marcos, Guerrero
35 km (21 mi)
NW of epicenter
Kilometro 30
(pop: 6,300)
IV: Light
Acapulco de Juarez, Guerrero
36 km (22 mi)
NE of epicenter
Tecoanapa
(pop: 4,270)
IV: Light
Guerrero
39 km (24 mi)
NW of epicenter
Xaltianguis
(pop: 6,970)
IV: Light
Acapulco de Juarez, Guerrero
41 km (25 mi)
N of epicenter
Tierra Colorada
(pop: 11,500)
IV: Light
Juan R. Escudero, Guerrero
41 km (25 mi)
W of epicenter
Acapulco
(pop: 673,500)
IV: Light
Guerrero
41 km (25 mi)
NE of epicenter
El Terrero
(pop: 1,060)
IV: Light
Juan R. Escudero, Guerrero
44 km (27 mi)
E of epicenter
Florencio Villarreal
(pop: 11,800)
IV: Light
Guerrero
50 km (31 mi)
E of epicenter
Ayutla de los Libres
(pop: 15,400)
IV: Light
Guerrero
50 km (31 mi)
W of epicenter
Bajos del Ejido
(pop: 6,170)
IV: Light
Coyuca de Benitez, Guerrero
51 km (32 mi)
E of epicenter
Tonala
(pop: 2,180)
IV: Light
Ayutla de los Libres, Guerrero
51 km (32 mi)
N of epicenter
Buena Vista de la Salud
(pop: 2,230)
IV: Light
Chilpancingo de los Bravo, Guerrero
54 km (34 mi)
NW of epicenter
Tixtlancingo
(pop: 3,640)
IV: Light
Coyuca de Benitez, Guerrero
56 km (35 mi)
E of epicenter
Cuautepec
(pop: 3,570)
IV: Light
Guerrero
63 km (39 mi)
E of epicenter
Copala
(pop: 6,620)
III: Weak
Guerrero
64 km (40 mi)
W of epicenter
Coyuca de Benitez
(pop: 13,600)
III: Weak
Coyuca de Benitez, Guerrero
71 km (44 mi)
N of epicenter
Mazatlan
(pop: 5,320)
III: Weak
Chilpancingo de los Bravo, Guerrero
75 km (47 mi)
NE of epicenter
Quechultenango
(pop: 5,720)
III: Weak
Guerrero
78 km (48 mi)
NW of epicenter
Tepetixtla
(pop: 3,640)
III: Weak
Coyuca de Benitez, Guerrero
80 km (50 mi)
E of epicenter
Marquelia
(pop: 6,550)
III: Weak
Guerrero
84 km (52 mi)
N of epicenter
Chilpancingo de los Bravo
(pop: 187,300)
III: Weak
Guerrero
85 km (53 mi)
E of epicenter
San Luis Acatlan
(pop: 8,280)
III: Weak
Guerrero
86 km (54 mi)
N of epicenter
Tixtla de Guerrero
(pop: 22,800)
III: Weak
Guerrero
95 km (59 mi)
N of epicenter
Zumpango del Rio
(pop: 24,700)
III: Weak
Eduardo Neri, Guerrero
97 km (60 mi)
NE of epicenter
Chilapa de Alvarez
(pop: 31,200)
III: Weak
Chilapa de Alvarez, Guerrero
97 km (60 mi)
N of epicenter
Chichihualco
(pop: 10,700)
III: Weak
Leonardo Bravo, Guerrero
106 km (66 mi)
NW of epicenter
Atoyac de Alvarez
(pop: 21,400)
III: Weak
Atoyac de Alvarez, Guerrero
120 km (75 mi)
E of epicenter
Ometepec
(pop: 24,100)
III: Weak
Guerrero
131 km (81 mi)
NE of epicenter
Tlapa de Comonfort
(pop: 47,000)
III: Weak
Guerrero
295 km (184 mi)
N of epicenter
Mexico
(pop: 12,294,200)
II: Very weak
Mexico D.F.
Notes:
(*) Shaking intensity according to the Modified Mercalli Intensity Scale (MMI) and estimated using seismic models.

User-reports for this quake

There are no user reports for this quake yet.

If you felt it, be the first to report it!
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake.

Compare Quake Data

Data for the same earthquake as reported by different agencies

The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
Mag Depth Time GMT
2023-11-21
Epicenter Agency
4.9 16 km
9.9 mi
20:24:31 Mexico: 15 Km Al OESTE De SAN MARCOS, GRO SSN (Servicio Sismológico Nacional)
4.5 25 km
16 mi
20:24:29 6 Km SW of San Marcos, Mexico
12 km (7.4 mi) epicenter difference with SSN
USGS (United States Geological Survey)
4.5 25 km
16 mi
20:24:29 Guerrero, Mexico
12 km (7.4 mi) epicenter difference with SSN
EMSC (European-Mediterranean Seismological Centre)

Seismograms

Seismic station: TLAPA (TLIG/MX network) | Distance from quake: 133 km / 83 mi | Show on map | Station Info
Seismic station TLAPA: vertical movement plot around time of quake (source: IRIS/BUD)
Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Bandpass filter applied: 0.2-10.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool
Show more

Aftershocks for this quake

No aftershocks have been recorded so far. When aftershocks are detected, we will update this section.

What are aftershocks?


Larger earthquakes (above magnitude 5 or so) such as this one are usually followed by smaller ones known as aftershocks that occur in the same area during the days, weeks, months or even years after the main shock.
[More info]

What about this quake?


Based on its magnitude, the fault that was active during the quake likely ruptured beneath a surface of approx. 8 km2 (=3 sqare miles) as a first-order estimate. The length of the rupture zone thus was probably around 5 km (3 mi).
[More info]


Recorded aftershocks, latest first (0 quake)

Date and Time GMTMag
Depth
DistanceRegionDetails
Nov 21, 2023 02:24 pm (Mexico City)
14 weeks ago - felt
4.9

16 km
0 km - This quake41 km E of Acapulco, Guerrero, Mexico
Main Shock (this quake)
More

Map of aftershocks

Earthquake statistics

Average number of earthquakes

Based on data from the past 10 years and our earthquake archive back to 1900, there are about 7,800 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):
  • Mag. 7 or higher: 0.06 quakes per year (or 1 quake every 17.9 years)
  • Mag. 6 or higher: 0.21 quakes per year (or 1 quake every 4.9 years)
  • Mag. 5 or higher: 1.17 quakes per year
  • Mag. 4 or higher: 86 quakes per year
  • Mag. 3 or higher: 739 quakes per year (or 62 quakes per month)
  • Mag. 2 or higher: 767 quakes per year (or 64 quakes per month)
The area where this quake occurred has a very high level of seismic activity. It has had at least 7 quakes above magnitude 7 since 1900, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 15 to 20 years.

Number of quakes per year

Previous quakes in the same area of this earthquake

Map of earlier quakes in the area of this quake

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