Earthquake Hits Near Morón, Argentina, with Multiple Aftershocks
A 4.5-magnitude earthquake struck 20 kilometers east of Morón, Argentina, on March 15, 2023, followed by at least five recorded aftershocks, according to the United States Geological Survey (USGS). The U.S. agency reported the main quake occurred at 10:42 a.m. local time, with no immediate reports of injuries or significant damage.
Magnitude and Location of the Earthquake
The USGS classified the earthquake as a shallow quake, with its epicenter located 10 kilometers below the surface. Morón, a city in Buenos Aires Province, is approximately 50 kilometers west of Argentina’s capital, Buenos Aires. Local authorities in the province confirmed the tremor was felt across several nearby municipalities, including San Isidro and Vicente López.
Aftershocks and Seismic Activity
The USGS recorded three aftershocks measuring between 3.2 and 3.8 on the Richter scale within 24 hours of the main quake. The Argentine National Seismic Network (RNAS) also reported additional minor tremors, though none exceeded magnitude 2.5. Scientists noted the activity aligns with typical patterns in the region, which experiences occasional seismic events due to its proximity to the South American Plate’s eastern boundary.
Impact and Response
Local emergency services in Buenos Aires Province stated there were no reports of structural damage or power outages. However, residents in Morón described feeling the quake for several seconds, with some noting objects falling from shelves. The National Civil Protection Agency (ONPC) advised citizens to remain cautious and avoid areas prone to landslides, citing recent heavy rainfall in the region.
Historical Context and Seismic Risk
Argentina’s southern regions, particularly near the Andes Mountains, are more prone to major earthquakes. However, the Morón area is not historically active. A 2019 study by the Argentine Institute of Seismology (IASe) noted that smaller tremors in the Buenos Aires region are often linked to underground geological faults, though they rarely cause significant harm.
What Happens Next?
Seismologists emphasize that aftershocks can continue for days or weeks following a major quake. The USGS and RNAS have maintained monitoring stations in the area to track activity. Residents are encouraged to stay updated through official channels, such as the ONPC’s website or the USGS’s real-time earthquake map.
Why This Matters
While the Morón quake was relatively minor, it highlights the importance of preparedness in regions with low but persistent seismic risk. Experts point to the 2010 Chile earthquake as a precedent, where even moderate tremors in less active zones can lead to unexpected consequences if infrastructure is not properly reinforced.
Summary
The March 15, 2023, earthquake near Morón, Argentina, underscores the need for ongoing seismic monitoring and public awareness, even in areas with infrequent activity. Authorities continue to assess the situation, with no immediate threats reported.