Mexico Earthquake Activity Includes M4.6 Offshore Baja California Sur and M4.1 Near Felipe Carrillo Puerto
Mexico earthquake activity continued on Friday with two moderate events recorded by the USGS, one near Felipe Carrillo Puerto and another off the coast of Baja California Sur, while aftershocks from an earlier quake persisted in Oaxaca.
Recent Seismic Activity in Mexico
The M4.1 earthquake occurred at a depth of 11.2 km, 51 km east of Felipe Carrillo Puerto. [1] The M4.6 earthquake struck at a depth of 10.0 km off the coast of Baja California Sur. [2] No earthquakes of magnitude 4.0 or greater were recorded in Mexico through 08:00 on Saturday, June 20, 2026. [3] The most recent event before that cutoff registered as magnitude 4.0, 17 kilometers southeast of Petatlán, Guerrero, at 19:58 hours on Friday. [3] These reports align with ongoing monitoring that tracks all seismic events across the country, including those below magnitude 3.0 that occur frequently in the capital. [3]
Details on the Two Recent Quakes
The M4.1 earthquake occurred at a depth of 11.2 km, 51 km east of Felipe Carrillo Puerto. [1] The M4.6 earthquake struck at a depth of 10.0 km off the coast of Baja California Sur. [2] Both events fit within the pattern of seismic activity that the Servicio Sismológico Nacional tracks daily through official channels. [3] The absence of additional magnitude 4.0 or greater events into Saturday morning indicates a temporary lull following the Friday afternoon activity. [3] Mexico earthquake monitoring continues to capture these occurrences as part of routine data collection from the high-seismicity environment.
Neighbors oppose repairs to a building damaged by an earthquake in Mexico. — Source: gdelt
Ongoing Aftershocks from May Oaxaca Quake
As of 20:00 on Friday, June 19, 1,804 aftershocks have been recorded from the May 4 magnitude 5.6 earthquake in Pinotepa Nacional, Oaxaca, with the largest aftershock at magnitude 4.1. [3] The Servicio Sismológico Nacional continues to log every aftershock from that event through its official updates. [3] This tally reflects the extended sequence that followed the mainshock in the southern region. [3] The largest aftershock reached the same magnitude threshold as one of the Friday events, underscoring the ongoing nature of the sequence. [3]
National Seismic Monitoring Overview
Mexico is located in a high-seismicity zone, which makes frequent earthquakes common, especially in the south including Guerrero, Chiapas, and Oaxaca, as well as the central region where the capital sits. [3] The Servicio Sismológico Nacional maintains continuous monitoring of all seismic events nationwide, from major quakes down to microsismos below magnitude 3.0 that occur regularly in Mexico City. [3] Although seismic movement happens constantly due to tectonic plate dynamics, only certain events draw special attention based on their location and potential impact. [3] The agency issues reports through official channels whenever notable activity develops. [3]
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Safety Guidelines for Earthquakes
The Servicio Sismológico Nacional recommends specific measures before, during, and after an earthquake. [3] Before an event, families should establish an emergency plan, identify safe zones and evacuation routes, secure furniture that could fall, keep a first-aid kit, flashlight, battery radio, and important documents ready, and participate in drills while preparing to stay calm. [3] During an earthquake, remain calm, protect yourself under a sturdy table if evacuation is possible, move away from windows, glass, doors, and falling objects, avoid elevators and running outside, stop a vehicle in a safe place if driving, follow the emergency plan, and assist vulnerable people. [3] After an earthquake, check for injuries and provide first aid if needed, avoid walking barefoot or in dark areas, control gas, water, and electricity leaks, use battery flashlights instead of matches or electrical switches, stay informed through reliable media, cooperate with authorities, avoid spreading rumors, and assess structural safety before re-entering a building. [3]
Lingering Structural Risks from 2017 Earthquake
The building at Patricio Sanz 529 in colonia Del Valle Centro, alcaldía Benito Juárez, suffered serious damage in the September 19, 2017 earthquake and remains occupied despite progressive structural deterioration. [4] A district judge issued an injunction halting reinforcement work by the Instituto de Vivienda de la Ciudad de México, marking the second time such work has stopped due to legal actions from new owners who acquired units after the quake. [4] Visible damage includes wall and column cracks, concrete spalling that exposes rebar, and separations between walls and columns, especially on the ground floor parking level and the first four stories. [4] The 10-level structure with 30 apartments, service rooms on the roof, and 50 years of age faces continued risk of collapse from ongoing seismic activity, according to the latest technical evaluation. [4] Some owners have rented units through specialized platforms while opposing repairs, and conflicts have arisen during condominium meetings, including threats and unauthorized removal of safety barriers around excavation areas. [4] Authorities have shown willingness to reconcile differences, yet better coordination is needed to declare the building uninhabitable, order temporary evacuation, and resume strengthening work. [4]
What to watch next: The Servicio Sismológico Nacional will continue issuing updates on any new events or additional aftershocks from the Pinotepa Nacional sequence through its official channels.
