According to records of the National Seismological System (SSN)Mexican institution in charge of monitoring seismic activity in Mexico in real time, The states of Oaxaca and Guerrero recorded seismic activity during the early morning and morning hours of October 20.
The SSN operates a network of seismological stations distributed throughout the country that send data continuously and in real time to an analysis center to determine the date, time, magnitude, epicenter and depth of earthquakes.
Last weekend, The state of Oaxaca recorded frequent seismic activity close to magnitude 4: The records mark the beginning of persistent earthquakes since 02:00 last Saturday, 19 km southeast of Río Grande.
Saturday
- 47 km northeast of Matías Romero – magnitude of 3.6 at 02:24 hours
- 10 km south of Pinotepa Nacional – 3.8, 02:50 hours
- 30 km southwest of San Pedro Pochutla – 4.2, 05:06 hours
- 30 km southwest of San Pedro Pochutla – 4.0, 05:11 hours
- 77 km southeast of Salina Cruz – 3.7, 06:58 hours
- 25 km northeast Puerto Escondido – 3.9, 08:15 hours
- 102 km southeast of Salina Cruz – 3.5, 12:51 hours
- 75 km southeast of Salina Cruz – 4.2, 22:34 hours
Domingo
- 14 km northeast of Ocotlán de Morelos – magnitude 4.2 at 03:01 a.m.
- 12 km southeast of Pinotepa Nacional – 3.4, 06:45 hours
- 16 km north of Pinotepa Nacional – 3.3, 08:58 hours
- 12 km northwest of Rio Grande – 3.4, 09:24 hours
- 16 km east of Matías Romero – 3.7, 09:28 hours
- 115 km southeast of Salina Cruz – 3.9, 09:48 hours
- 21 km northeast of Puerto Escondido – 3.9, 09:54 hours
- 17 km southeast of Matías Romero – 3.9, 11:26 hours
- 47 km southeast of Salina Cruz – 3.6, 14:48 hours
- 21 km south of Rio Grande – 3.7, 15:36 hours
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Tremors recorded this October 20, 2025
The early morning and morning of this Monday, October 20, seismic activity continued in Oaxaca and was joined by Guerrero; Below we present more details of these telluric movements recorded by the SSN.
Oaxaca
| MAGNITUDE | TIME | EPICENTER | DEPTH |
| 4.1 | 07:20:51 | 19 km west of Rio Grande | 22.6 km |
Guerrero
| MAGNITUDE | TIME | EPICENTER | DEPTH |
| 4.1 | 02:10:05 | 38 km southwest of Zihuatanejo | 5 km |
| 4.2 | 04:26:53 | 32 km south of Ciudad Altamirano | 55.7 km |
So far, the Civil Protection and Firefighters authorities of the entities have not reported any damage.
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The post Tremor TODAY: Guerrero and Oaxaca presented seismic activity in the first hours of this Monday appeared first on Veritas News.
