September 19, 2022 Earthquake: Michoacan, Colima, Jalisco, Mexico

Reference #13456:

At least 2 people killed and 9 injured; 2,790 homes and 29 public buildings damaged; 5 bridges destroyed and 13 roads damaged; landslides occurred on a highway near Tecoman; widespread power and telephones outages occurred throughout 10 municipalities in Colima. At least 26 people injured, 3,161 homes and 89 public buildings damaged and several roads damaged in Michoacan. Two people injured and some buildings damaged in Nayarit. One person injured and several buildings damaged in Jalisco. Maximum intensity VIII

Tectonic Summary

The September 19, 2022, M7.6 earthquake near the Pacific Coast of Mexico occurred as the result of shallow thrust faulting. The location, depth, and mechanism of the event are broadly consistent with slip on or near the boundary interface between the subducting Cocos oceanic plate and the North America plate. The broad-scale tectonics of the Pacific Coast of Mexico are controlled by the northeastward subduction of the Cocos plate beneath the North America plate at a rate of approximately 70 mm/yr.

While commonly plotted as points on maps, earthquakes the size of the September 19, 2022, event are more appropriately described as slip over a larger fault area. Earthquakes of this size and mechanism are typically about 90x40 km (length x width).

Earthquakes are a common occurrence along the Middle America subduction zone. In the preceding 50 years, there have been 13 other earthquakes M 6.5 or larger within 250 km of the September 19th event. This includes the 1995 M 8.0 event approximately 125 km to the northwest as well as the 1985 M 8.0 event approximately 80 km to the southeast. Both the 1985 M 8.0 event and a M 7.1 earthquake near Matzaco, Mexico, in 2017 occurred on the date September 19. Despite the coincidence, there is no specific date or time of year when Mexico is statistically more prone to seismic activity.

Armeria, Colima, Mexico - CDI: 9; Coahuayana, Michoacan, Mexico - CDI: 9; Aguililla, Michoacan, Mexico - CDI: 8; Coalcoman, Michoacan, Mexico - CDI: 7; Santa Clara de Valladares, Michoacan, Mexico - CDI: 7

Reference #13328, #13330:

2 death in Manzanillo, 10 injuries in Colima, Manzanillo, Tecoman, Coalcoman. Damages in Colima, Michoacan, Jalisco Aguascalinetes, Cuidad de Mexico, Nayarit, Estado de Mexico. Damages to homes: Michoacan: 3,161, Colima: 2,923.

Reference #13332:

Seiching in Nevada, USA

Reference #1250:

2 deaths, 9 injured, 25 million USD total damages