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PHIVOLCS Observatory at Mount Hibok-Hibok.. The Philippine Institute of Volcanology and Seismology (PHIVOLCS, Tagalog:; Tagalog: Surian ng Pilipinas sa Bulkanolohiya at Sismolohiya) is a Philippine national institution dedicated to provide information on the activities of volcanoes, earthquakes, and tsunamis, as well as other specialized information and services primarily for the protection of ...
Gutenberg–Richter law. In seismology, the Gutenberg–Richter law [1] ( GR law) expresses the relationship between the magnitude and total number of earthquakes in any given region and time period of at least that magnitude. or. where. is the number of events having a magnitude , and are constants, i.e. they are the same for all values of and .
A volcano tectonic earthquake or volcano earthquake is caused by the movement of magma beneath the surface of the Earth. [1] The movement results in pressure changes where the rock around the magma has a change in stress. At some point, this stress can cause the rock to break or move. This seismic activity is used by scientists to monitor ...
The convergent boundary is the source for many historically documented tsunamigenic earthquakes in 1833, 1940, 1964, 1983, and most recently, the 1993 southwest off Hokkaido earthquake. [11] Based on analyzing records of the tsunami heights, a large magnitude 7.5–8.4 earthquake along the eastern margin of the Sea of Japan would have been ...
The Aleutian Arc is a large volcanic arc of islands extending from the Southwest tip of the U.S. state of Alaska to the Kamchatka Peninsula of the Russian Federation. It consists of a number of active and dormant volcanoes that have formed as a result of the subduction of the Pacific Plate beneath the North American Plate along the Aleutian ...
e. The Central American Volcanic Arc (often abbreviated to CAVA) is a chain of volcanoes which extends parallel to the Pacific coastline of the Central American Isthmus, from Mexico to Panama. This volcanic arc, which has a length of 1,100 kilometers (680 mi) [1] [2] is formed by an active subduction zone, with the Cocos Plate subducting ...
This zone of intense earthquake activity is located deep within the interior of the North American plate. An intraplate earthquake is an earthquake that occurs in the interior of a tectonic plate, in contrast to an interplate earthquake on the boundary of a tectonic plate. It is also called an intraslab earthquake, especially when occurring in ...
In the east-central Baja California there are several volcanoes and this one lies east of the Tres Vírgenes volcano and southeast of El Aguajito. La Reforma is a caldera volcano, formed when a large eruption left an empty magma chamber, which the upper volcano collapsed into. La Reforma's last major eruption occurred about 10,000 years ago.