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The macroseismic epicenter is the best estimate of the location of the epicenter derived without instrumental data. This may be estimated using intensity data, information about foreshocks and aftershocks, knowledge of local fault systems or extrapolations from data regarding similar earthquakes.
The epicenter, or epicentre, is the point on the Earth's surface that is directly above the point where an earthquake or underground explosion originates. Epicenter or epicentre may also refer to: Blast seat , the point of detonation of an explosive device
Map showing Earth's principal tectonic plates and their boundaries in detail. These plates comprise the bulk of the continents and the Pacific Ocean.For purposes of this list, a major plate is any plate with an area greater than 20 million km 2 (7.7 million sq mi)
1979 Imperial Valley earthquake – magnitude 6.4 earthquake with an epicenter less than 1 km inside Mexico – significant damage and injuries on both sides of the border (60 in the US) 2010 Baja California earthquake (Mexico near S California) – magnitude 7.2 earthquake, 4 fatalities and 100 injuries, none in the United States
Hypocenter (Focus) and epicenter of an earthquake. An earthquake's hypocenter or focus is the position where the strain energy stored in the rock is first released, marking the point where the fault begins to rupture. [3] This occurs directly beneath the epicenter, at a distance known as the hypocentral depth or focal depth. [3]
Earthquakes (6.0+ M w) between 1900 and 2017 Earthquakes are caused by movements within the Earth's crust and uppermost mantle.They range from weak events detectable only by seismometers, to sudden and violent events lasting many minutes which have caused some of the greatest disasters in human history.
Along the Motagua Fault trace (1976 Guatemala earthquake) where it crosses the Gualán soccer field.This zigzag type of fault trace is known as "mole track", which is best developed in hard-packed, brittle surface materials.
Earthquakes in the Philippines and adjacent areas 1900 to 2012 Earthquakes in the Philippines and adjacent areas 1500 to 1899. Much of the Philippines lie within the area of strongly tectonised blocks of mainly island arc origin, known as the Philippine Mobile Belt.