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The irrigation systems in the Imperial Valley were badly affected, but no deaths occurred. It was the largest earthquake to occur in the contiguous United States since the 1971 San Fernando earthquake eight years earlier. The earthquake was 6.5 on the M w scale, with a maximum perceived intensity of IX (Violent) on the Mercalli intensity scale.
The 1987 Superstition Hills earthquake affected the Imperial Valley of California and Baja California on November 24, nearly 12 hours after a M w 6.0 foreshock, called the Elmore Ranch earthquake. The mainshock , measuring M w 6.5, struck at 17:54 PST, along the Superstition Hills segment of the San Jacinto Fault Zone .
The Baja California peninsula lies near the boundary of the Pacific plate and the North American plate, while southern Mexico lies just north of the boundary between the North American plate and the Cocos and Rivera tectonic plates. The Cocos plate is subducting under the North American plate at a rate of 67 mm (0.220 ft) per year, while the ...
The quake — preceded by Thursday's 6.4-magnitude temblor in the Mojave Desert — was the largest Southern California temblor in at least 20 years and was followed by a series of large and small ...
The quake originally was believed to have occurred on the Laguna Salada Fault, which is about 60 kilometers (37 mi) to 80 km (50 mi) long and straddles the California–Baja California border. [6] The active Laguna Salada Fault ruptured in February 1892 with an estimated M w 7.2 earthquake. [7] [8]
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1910 Costa Rica earthquakes: 1910-05-04: Cartago: 6.4 [10] 700 1822 Costa Rica earthquake: 1822-05-07: near Caribbean Coast 7.6 IX Unknown Note: The inclusion criteria for adding events are based on WikiProject Earthquakes' notability guideline that was developed for stand alone articles. The principles described also apply to lists.
The 1991 Costa Rica earthquake, also known as the Limon earthquake or Bocas del Toro earthquake, occurred at 3:57 pm local time (21:56:51 UTC) on April 22.The epicenter of the 7.7 M w earthquake was in Pandora, Valle La Estrella, in the Caribbean region of Limon, Costa Rica, 225 kilometres (140 mi) southeast of San José.