Mexico City — In response to the series of earthquakes recently felt in the western region of Mexico City, the National Civil Protection Coordination (CNPC), alongside the National Center for Disaster Prevention (Cenapred), has reassured the public that the seismic events do not represent unusual behavior for the capital city. These shallow earthquakes, while strongly perceived by residents in the affected areas, have been classified as natural occurrences typical of Mexico City’s seismically active environment.
According to the National Seismological Service (SSN) of the National Autonomous University of Mexico (UNAM), from the early hours of September 26 to this morning, 17 earthquakes were recorded in the region. The tremors, which ranged in magnitude from 1.0 to 2.9, were notably shallow, with a depth of just one kilometer, making them more noticeable despite their low magnitudes. The largest quake, registering at M2.9, struck at 00:39 on September 26.
Cenapred experts emphasized that this series of earthquakes is not indicative of any impending larger seismic event. They pointed out that since January 2019, the SSN has recorded similar activity in the west of Mexico City, including seven earthquakes with magnitudes ranging from 2.9 to 3.3. These occurrences have been accompanied by aftershocks, often continuing for more than 24 hours after the initial event.
“More than 10 seismic events were observed within the first 24 hours following the September 26 tremor, confirming that this pattern of seismic activity is consistent with previous episodes,” said a Cenapred spokesperson. “There is no evidence to suggest any abnormal seismic behavior or imminent risk of a major earthquake in the region.”
While these shallow earthquakes were intensely felt by those residing in western Mexico City, no damage has been reported, and the seismic alert system was not activated. The CNPC clarified that the alert system is designed primarily to warn residents of larger earthquakes originating from the Pacific Ocean’s subduction zone, where the Cocos Plate meets the North American Plate. Mexico City, located inland, frequently experiences tremors, but these smaller, localized events are not sufficient to trigger the seismic alert.
In a statement, Mexico City authorities reiterated the importance of staying informed but also urged the public to remain calm. The National Seismological Service continues to monitor seismic activity closely, providing real-time updates as part of its commitment to public safety.
While earthquakes remain an inevitable part of life in Mexico City, the CNPC and Cenapred remind residents that preparedness remains the best defense. They encouraged the public to review safety protocols, ensure homes are earthquake-resistant, and have emergency plans in place. For now, officials affirm that the current seismic activity poses no imminent threat.
Understanding Mexico City’s Seismic Landscape
Mexico City’s geographical location makes it particularly vulnerable to seismic activity. Built on the ancient lakebed of Lake Texcoco, the soft soil amplifies seismic waves, making even distant earthquakes feel more powerful in the capital. This phenomenon is often referred to as the “Mexico City Effect,” where the amplification of seismic waves leads to more significant shaking, even for smaller quakes.
Despite these challenges, Mexico City has invested heavily in earthquake preparedness. The seismic alert system, known as SASMEX, is one of the most advanced in the world, giving residents crucial seconds to take cover before larger tremors hit. However, as noted by the CNPC, this system does not activate for smaller, localized quakes such as those experienced on September 26.
Recent Earthquake Activity in the West of Mexico City
The CNPC and Cenapred provided a list of significant seismic events recorded in western Mexico City since January 2019, highlighting their similarity to the recent quakes. While these events have caused concern among residents, they are not considered unusual.
A graphic released by authorities shows the pattern of earthquake occurrences, further illustrating that this region of Mexico City regularly experiences low-magnitude seismic activity. The CNPC used this data to reassure the public that yesterday’s events fit within the broader context of the city’s seismic history.
Preparing for the Future
In light of the recent quakes, Mexico City officials are urging residents to take proactive steps in preparation for larger seismic events. While the current tremors pose no immediate threat, experts caution that Mexico City’s vulnerability to earthquakes means that residents should always be prepared.
Key recommendations include:
- Keeping an emergency kit stocked with essentials such as water, non-perishable food, first-aid supplies, and important documents.
- Identifying safe spaces in homes and workplaces, such as sturdy furniture to take cover under during a quake.
- Staying informed by subscribing to official seismic alert systems and following trusted news sources for updates.
Despite the relatively minor nature of the recent seismic activity, the events serve as a timely reminder of the importance of earthquake preparedness in Mexico City. With vigilance and preparedness, residents can mitigate the risks posed by future seismic events and ensure their safety in this geologically active region.
Monitoring Continues
As the National Seismological Service continues to monitor seismic activity in real time, the CNPC has committed to keeping the public informed of any significant changes. In the meantime, residents are encouraged to stay calm and continue with their daily routines, as the current seismic activity is not expected to lead to larger events.
Mexico City’s history is deeply intertwined with seismic events, and while the earthquakes on September 26 caused concern among some residents, authorities have stressed that there is no immediate cause for alarm. For now, life in the capital can proceed as usual, with officials maintaining a close watch on seismic developments.
As always, preparedness remains key.
