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The earliest known earthquake in the U.S. state of California was documented in 1769 by the Spanish explorers and Catholic missionaries of the Portolá expedition as they traveled northward from San Diego along the Santa Ana River near the present site of Los Angeles. Ship captains and other explorers also documented earthquakes.
The 1931 Hawke's Bay earthquake, also known as the Napier earthquake, occurred in New Zealand at 10:47 am on 3 February, killing 256, [3] injuring thousands and devastating the Hawke's Bay region. It remains New Zealand's deadliest natural disaster .
Outline map of the area around Napier before and after the 1931 earthquake Hawke's Bay Airport occupies part of the land raised from what was Ahuriri Lagoon. Ahuriri Lagoon (Māori: Te Whanganui-a-Orotū) was a large tidal lagoon at Napier, on the east coast of New Zealand's North Island, that largely drained when the area was raised by the 1931 Hawke's Bay earthquake.
That envisions a magnitude 7.8 earthquake that could result in 1,800 deaths and nearly 50,000 injuries — the deadliest quake in modern Southern California history. More than 1,000 of those ...
The magnitude of an earthquake can be estimated by measuring the area affected by intensity level III or above in km 2 and taking the logarithm. [1] A more accurate estimate relies on the development of regional calibration functions derived using many isoseismal radii. [7] Such approaches allow magnitudes to be estimated for historical ...
Here are the notable recorded earthquakes on the Calaveras fault: 2022 (5.1), 2007 (5.6), 1984 (6.2) and 1911 (6.5). A number of magnitude 6 earthquakes have been recorded on the fault throughout recorded history, the largest of which was a magnitude 6.5 that occurred in 1911 in the Morgan Hill area. [4]
The United States Geological Survey says there have been at least 40 other earthquakes of a magnitude 6.0 or larger in the region during the last 100 years. 7.0 California Shake Intensity
The 1927 Lompoc earthquake occurred on November 4 at 05:49 PST with an epicenter off the coast of Santa Barbara County Southern California. [1] The earthquake measured 7.0 on the moment magnitude scale and had a maximum Modified Mercalli intensity of IX (Violent). It caused widespread damage in several towns of Santa Barbara County.