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The JMA scale is expressed in levels of seismic intensity from 0 to 7 in a manner similar to that of the Mercalli intensity scale, which is not commonly used in Japan.. Real-time earthquake reports are calculated automatically from seismic-intensity-meter measurements of peak ground acceleration throughout an affected area, and the JMA reports the intensities for a given quake according to the ...
The epicenter region of the earthquake was located in the San Fernando Valley, about 30 km (19 mi) northwest of downtown Los Angeles. The United States Geological Survey (USGS) placed the hypocenter 's geographical coordinates at 34°12′47″N 118°32′13″W / 34.213°N 118.537°W / 34.213; -118.537 and at a depth of 11.31 miles ...
Probabilistic seismic hazard map. 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 ...
In Japan, the Shindo scale is commonly used to measure earthquakes by seismic intensity instead of magnitude. This is similar to the Modified Mercalli intensity scale used in the United States or the Liedu scale used in China, meaning that the scale measures the intensity of an earthquake at a given location instead of measuring the energy an earthquake releases at its epicenter (its magnitude ...
The 2016 Kumamoto earthquakes were about 140 km (87 mi) northwest of the 2024 Hyūga-nada earthquake and were caused by a similar subduction zone. [2] About 2 km (1.2 mi) beneath the seafloor, low-frequency earthquakes, occur near the shallow subduction interface.
The foreground is in the Santa Barbara Channel, the east-trending zone marks the Transverse Range. Faults in the upper left are part of the Eastern California Shear Zone, connecting northward with the Walker Lane region. Faults extend deeper than shown. Cumulative energy released by all earthquakes in Southern California from 1932 through July ...
The Los Angeles Basin is situated along the coast of Southern California at the confluence of the Transverse Ranges and the Peninsular Ranges.The basin is under the influence of several strike-slip and blind thrust faults with geodetic studies providing evidence of the northern basin being shortened in the north–south or northeast–southwest directions at a rate of 4.5–5 millimetres (0.18 ...
Elysian Park Fault is an active blind thrust fault located in Central Los Angeles, California.Approximately 20 km (12.4 miles) long, the fault is believed to able to produce a destructive earthquake of magnitude 6.2–6.7, about every 500–1,300 years, similar in size and frequency to the 1971 San Fernando earthquake or 1994 Northridge earthquake.