Earthquake in Mexico today September 4: epicenter of the latest tremor according to SSN report

• WHAT IS THE PACIFIC RING OF FIRE?

• The Pacific Ring of Fire is a geologically active region that surrounds the Pacific Ocean and the continents that border its waters. It is characterized by a high frequency of earthquakes and volcanic activity. It extends approximately 40,000 kilometers, including subduction zones where tectonic plates collide (such as the Nazca plate), generating frequent volcanoes and earthquakes.

• EARTHQUAKE OF MAGNITUDE 4.1 LOC. 141 KM SOUTHWEST OF CD HIDALGO, CHIS.

EARTHQUAKE Magnitude 4.1 Loc 141 km SOUTHWEST of CD HIDALGO, CHIS 09/04/26 15:29:32 Lat 14.22 Lon -93.37 Depth 14 km pic.twitter.com/L34aWjIBXM

— National Seismological Service (@SismologicoMX) September 4, 2026

• WHAT IS A SEISMIC SWARM?

• A seismic swarm is a group of earthquakes that occur in the same area over a short period of time. Unlike a single strong earthquake, seismic swarms usually consist of numerous smaller tremors. Often, there is no main earthquake triggering the swarm, but the seismic events occur more or less continuously and are related to tectonic processes.

• HOW TO ACT DURING AN EARTHQUAKE?
• • Go to the already established safety zones.
• • Stay away from glass or objects that could fall.
• • If possible, avoid panic and try to remain calm.
• • Do not run in vehicle passage areas.
• • If you are driving, stop your vehicle.
• • If you are in a building, do not use the elevator, always use the stairs.
• • Be attentive to minors, disabled people, and the elderly.

• HOW TO DIFFERENTIATE A TREMOR FROM AN EARTHQUAKE?

• The terms “tremor” and “earthquake” are often used interchangeably, but generally, the difference lies in their magnitude, perceived intensity, and reach.

• • Tremor: Refers to seismic movements of lesser intensity. Usually, it is used to describe low magnitude earth tremors that do not cause significant damage to structures or people. They are perceptible, but their impact is mild.

• • Earthquake: Refers to a seismic event of greater magnitude. Earthquakes are significant seismic tremors that can cause severe damage to buildings, infrastructure, and in the most severe cases, cause personal injuries and even loss of life. They have considerable magnitude and are often accompanied by aftershocks.

• EARTHQUAKE OF MAGNITUDE 4.0 LOC. 142 KM SOUTHWEST OF CD HIDALGO, CHIS.

EARTHQUAKE Magnitude 4.0 Loc 142 km SOUTHWEST of CD HIDALGO, CHIS 09/04/26 14:13:24 Lat 14.18 Lon -93.36 Depth 11 km pic.twitter.com/2JkVUu25Qn

— National Seismological Service (@SismologicoMX) September 4, 2026

• WHY SHOULD YOU NEVER USE AN ELEVATOR DURING AN EARTHQUAKE?

• Experts recommend never using the elevator during an earthquake, as it could detach from its structure and fall from a great height with people inside.

• WHAT IS SEISMIC SILENCE?

• Seismic silence is a prolonged period without significant seismic activity or intensity in a region, which may indicate the accumulation of tectonic stresses and an increased risk of a future earthquake.

• WHAT IS AN EARTHQUAKE?

• An earthquake is a sudden rupture of rocks inside the Earth. This sudden release of energy propagates in the form of waves that cause ground movement.

• WHAT TO DO IN CASE OF A TSUNAMI?

• If you receive official tsunami alert or warning information or see the sea receding, evacuate to higher areas. Move to a flood-free zone and head to the nearest meeting point. If you cannot reach a higher area, go to an upper floor or the roof of a solid building.

• WHAT IS A SEISMIC SWARM?

• A seismic swarm is a group of earthquakes that occur in the same area over a short period of time. Unlike a single strong earthquake, seismic swarms usually consist of numerous smaller tremors. Often, there is no main earthquake triggering the swarm, but the seismic events occur more or less continuously and are related to tectonic processes.

• CHECK WHAT AN EMERGENCY HOME BACKPACK SHOULD CONTAIN.

• EARTHQUAKE OF MAGNITUDE 4.1 LOC. 13 KM SOUTHWEST OF PUERTO ESCONDIDO, OAX.

EARTHQUAKE Magnitude 4.1 Loc 13 km SOUTHWEST of PUERTO ESCONDIDO, OAX 09/04/26 13:13:36 Lat 15.78 Lon -97.15 Depth 10 km pic.twitter.com/z6J0uf11tf

— National Seismological Service (@SismologicoMX) September 4, 2026

• EARTHQUAKE OF MAGNITUDE 4.2 LOC. 106 KM SOUTHWEST OF CD HIDALGO, CHIS.

EARTHQUAKE Magnitude 4.2 Loc 106 km SOUTHWEST of CD HIDALGO, CHIS 09/04/26 09:24:47 Lat 14.36 Lon -93.08 Depth 10 km pic.twitter.com/7wZbwJrGGe

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— National Seismological Service (@SismologicoMX) September 4, 2026

• EARTHQUAKE OF MAGNITUDE 4.1 LOC. 145 KM SOUTHWEST OF MAPASTEPEC, CHIS.

EARTHQUAKE Magnitude 4.1 Loc 145 km SOUTHWEST of MAPASTEPEC, CHIS 09/04/26 08:36:57 Lat 14.44 Lon -93.75 Depth 10 km pic.twitter.com/84x6yHpOes

— National Seismological Service (@SismologicoMX) September 4, 2026

• WHAT SHOULD MY EMERGENCY BACKPACK CONTAIN?
• • Essential hygiene items
• • First aid kit (bandages, gauze, alcohol, pills, hydrogen peroxide, etc.)
• • Warm clothing
• • Non-perishable food (tuna cans, cereal bars, chocolates, nuts, etc.) and money
• • Communication items
• • Specific items for babies and infants, feminine use, elderly, and other basic needs.

• WHAT IS THE LARGEST MAGNITUDE EARTHQUAKE THAT SHOOK MEXICO CITY?
• On September 19, 1985, Mexico City experienced a devastating earthquake of 8.1 magnitude, with its epicenter on the Pacific coast. It is estimated that at least 10,000 people lost their lives, affecting and collapsing thousands of housing, commercial, and public service structures.

• WHAT IS THE DIFFERENCE BETWEEN MAGNITUDE AND INTENSITY OF AN EARTHQUAKE?

• They are scales to measure the size or impact of a tremor. The magnitude scale is obtained numerically from records obtained by seismographs and is related to the size and energy released during a tremor. The intensity scale is assigned based on the damage or effects caused to people and their constructions.

• WHY DO SO MANY EARTHQUAKES OCCUR IN MEXICO?

• In the context of Plate Tectonics, Mexico is located in the so-called Ring of Fire, where a large part of the seismic movements worldwide are recorded. The country is located on the North American Plate, bordered on its southern and western portion by the Cocos, Rivera, and Pacific plates.

• Earthquake 145 km southwest of Mapastepec, Chiapas

Magnitude: 4.1

Date: 09/04/26

Time: 08:36:57

Latitude: 14.44

Longitude: -93.75

Depth: 10 km

• Earthquake 127 km southwest of Ciudad Hidalgo, Chiapas

Magnitude: 4.1

Date: 09/04/26

Time: 04:15:41

Latitude: 14.12

Longitude: -93.18

• Earthquake 30 km south of Río Grande, Oaxaca

Magnitude: 4.1

Date: 09/04/26

Time: 01:28:25

Latitude: 15.74

Longitude: -97.42

Depth: 8 km

• As of 8:00 PM on September 3, 2026, 2,291 aftershocks of the M 7.4 earthquake that occurred in Ciudad Hidalgo, Chiapas on July 17, 2026, have been recorded, the largest with a magnitude of M 6.5.

• EARTHQUAKES 77 km NORTHWEST OF CINTALAPA, CHIAPAS
• Magnitude 4.0
• Date: 2026-09-03 
• Time: 19:37:29 (Central Time)
• Latitude: 17.059º
• Longitude: -94.337º
• Depth: 147.0 km

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• Drills are rehearsals that allow identifying what to do and how to act in case of an emergency by simulating real scenarios.

• Some of the advantages are:

• They allow verifying in advance if the actions we have prepared are efficient.
• They improve preparedness to act in an emergency or disaster.
• They promote civil protection culture among members of our family and community.

• EARTHQUAKE 18 km NORTHEAST OF HUIXTLA, CHIS
• Magnitude 4.0
• Date: 2026-09-03 
• Time: 16:34:47 (Central Time)
• Latitude: 15.216º
• Longitude: -92.321º
• Depth: 146.8 km

In case of earthquakes, be prepared by following these recommendations.

• WHAT TO DO DURING AN EARTHQUAKE IF YOU ARE AT HOME?

• CAN EARTHQUAKES BE PREDICTED?

To date, there is no technique that allows predicting earthquakes. Not even countries like the United States and Japan, whose technology is very advanced, have been able to develop a predictive technique for tremors.

• Earthquake 52 km southeast of PUERTO ESCONDIDO
• Local Date and Time: 2026-09-03  9:08:30
• Magnitude: 4.1
• Depth: 12.8 km
• Latitude: 15.441
• Longitude: -96.847

• CAN EARTHQUAKES BE PREDICTED?

To date, there is no technique that allows predicting earthquakes. Not even countries like the United States and Japan, whose technology is very advanced, have been able to develop a predictive technique for tremors. 

• CAN ALL EARTHQUAKES GENERATE TSUNAMIS?

A tsunami consists of waves several meters high produced by an earthquake whose hypocenter is located under the ocean. These earthquakes cause the seabed to move vertically, generating a violent displacement of the volume of water above it.

• Earthquake 44 km southeast of PUERTO ESCONDIDO
• Local Date and Time: 2026-09-03  7:35:44
• Magnitude: 4.3
• Depth: 16.2 km
• Latitude: 15.55
• Longitude: -96.819

• Earthquake 41 km southeast of SAYULA DE ALEMÁN
• Local Date and Time: 2026-09-03  5:33:52
• Magnitude: 4.8
• Depth: 152.3 km
• Latitude: 17.572
• Longitude: -94.746

• Earthquake 83 km southwest of MAPASTEPEC
• Local Date and Time: 2026-09-03  4:25:55
• Magnitude: 4.3
• Depth: 22.5 km
• Latitude: 14.778
• Longitude: -93.262

• Earthquake 57 km south of JALTIPAN DEMORELOS
• Local Date and Time: 2026-09-03  3:01:40
• Magnitude: 4.2
• Depth: 153.6 km
• Latitude: 17.458
• Longitude: -94.597

• WHAT IS THE LARGEST MAGNITUDE EARTHQUAKE THAT SHOOK MEXICO CITY?

• On September 19, 1985, Mexico City experienced a devastating earthquake of 8.1 magnitude, with its epicenter on the Pacific coast. It is estimated that at least 10,000 people lost their lives, affecting and collapsing thousands of housing, commercial, and public service structures.

• WHAT IS SEISMIC SILENCE?

• Seismic silence is a prolonged period without significant seismic activity or intensity in a region, which may indicate the accumulation of tectonic stresses and an increased risk of a future earthquake.

• WHAT IS AN EARTHQUAKE?

• An earthquake is a sudden rupture of rocks inside the Earth. This sudden release of energy propagates in the form of waves that cause ground movement.

• HOW LONG DOES AN EARTHQUAKE LAST AND WHY DOES THE SSN NOT REPORT THIS DATA?

• When we talk about the duration of an earthquake, we can refer to several different concepts: One is the duration of the movement perceived by humans, another is the duration of the instrumental record (which can be several minutes), and another is the time the fault movement that caused the earthquake lasted (which can be a few seconds).

• WHAT IS THE DIFFERENCE BETWEEN MAGNITUDE AND INTENSITY OF AN EARTHQUAKE?

• They are scales to measure the size or impact of a tremor. The magnitude scale is obtained numerically from records obtained by seismographs and is related to the size and energy released during a tremor. The intensity scale is assigned based on the damage or effects caused to people and their constructions.

• WHY DO SO MANY EARTHQUAKES OCCUR IN MEXICO?

• In the context of Plate Tectonics, Mexico is located in the so-called Ring of Fire, where a large part of the seismic movements worldwide are recorded. The country is located on the North American Plate, bordered on its southern and western portion by the Cocos, Rivera, and Pacific plates.

• Mexico is one of the countries in the world with the highest seismic activity, as according to statistics, more than 90 earthquakes per year with a magnitude greater than 4 on the Richter scale are recorded, which is equivalent to 60% of all seismic movements recorded worldwide.

What was the magnitude and where was the last tremor in Mexico? Watch live here the reports from the National Seismological Service SSN about earthquakes in the country.

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