Doublet earthquakeIn seismology, doublet earthquakes—and more generally, multiple earthquakes or twin earthquakes—were originally identified as multiple earthquakes with nearly identical waveforms originating from the same location.
2008 Sichuan earthquakeAn earthquake occurred in the province of Sichuan, China at 14:28:01 China Standard Time on May 12, 2008. Measuring at 8.0 Ms (7.9–8.3 Mw), the earthquake's epicenter was located 80 kilometres (50 mi) west-northwest of Chengdu, the provincial capital, with a focal depth of 19 km (12 mi). The earthquake ruptured the fault for over 240 km (150 mi), with surface displacements of several meters.
Fusakichi OmoriFusakichi Omori (大森 房吉, Ōmori Fusakichi; 30 October 1868 – 8 November 1923) was a pioneer Japanese seismologist, second chairman of seismology at Tokyo Imperial University and president of the Japanese Imperial Earthquake Investigation Committee. Omori is also known for his observation describing the aftershock rate of earthquakes, now known as Omori's law.
EarthquakeSudden movement of the Earth's crustEarthquake epicenters occur mostly along tectonic plate boundaries, especially on the Pacific Ring of Fire.An earthquake, also called a quake, tremor, or temblor, is the shaking of the Earth's surface resulting from a sudden release of energy in the lithosphere that creates seismic waves.
EpicenterThe epicenter (), epicentre, or epicentrum in seismology is the point on the Earth's surface directly above a hypocenter or focus, the point where an earthquake or an underground explosion originates. DeterminationThe primary purpose of a seismometer is to locate the initiating points of earthquake epicenters. The secondary purpose, of determining the 'size' or magnitude must be calculated after the precise location is known.
StochasticStochasticity is the property of being well-described by a randomprobability distribution. Stochasticity and randomness are technically distinct concepts: stochasticity refers to a modeling approach, while randomness describes phenomena. These terms are often used interchangeably. In probability theory, the formal concept of a stochastic process is also referred to as a random process.Tokuji UtsuTokuji Utsu (Japanese: 宇津 徳治, April 13, 1928 – August 18, 2004) was a Japanese seismologist and Professor Emeritus of University of Tokyo. He graduated from the Faculty of Science at the University of Tokyo in 1951 and became a professor at the Earthquake Research Institute, University of Tokyo in 1977. Utsu was compiling "Catalog of Damaging Earthquakes in the World". He received the Medal with Purple Ribbon, the Order of the Sacred Treasure, 2nd class and so on.
2004 Indian Ocean earthquake and tsunamiOn 26 December 2004, at 07:58:53 local time (UTC+7), a Mw 9.2–9.3 earthquake struck with its epicenter off the west coast of Aceh, in northern Sumatra, Indonesia. The underseamegathrust earthquake, known in the scientific community as the Sumatra–Andaman earthquake, was caused by a rupture along the fault boundary between the Burma plate and the Indian plate, and reached a maximum Mercalli intensity of IX in some areas.MainshockIn seismology, the mainshock is the largest earthquake in a sequence, sometimes preceded by one or more foreshocks, and almost always followed by many aftershocks.
SeismologySeismology (; from Ancient Greek σεισμός (seismós), meaning 'earthquake', and -λογία (-logía), meaning 'study of') is the scientific study of earthquakes (or generally, quakes) and the generation and propagation of elastic waves through planetary bodies.
WaveformIn electronics, acoustics, and related fields, the waveform of a signal is the shape of its graph as a function of time, independent of its time and magnitudescales and of any displacement in time. Periodic waveforms repeat regularly at a constant period. The term can also be used for non-periodic or aperiodic signals, like chirps and pulses. In electronics, the term is usually applied to time-varying voltages, currents, or electromagnetic fields.
Crust (geology)In geology, the crust is the outermost solid shell of a planet, dwarf planet, or natural satellite. It is usually distinguished from the underlying mantle by its chemical makeup; however, in the case of icy satellites, it may be defined based on its phase (solid crust vs. liquid mantle).
2008 Sichuan earthquakeAn earthquake occurred in the province of Sichuan, China at 14:28:01 China Standard Time on May 12, 2008. Measuring at 8.0 Ms (7.9–8.3 Mw), the earthquake's epicenter was located 80 kilometres (50 mi) west-northwest of Chengdu, the provincial capital, with a focal depth of 19 km (12 mi). The earthquake ruptured the fault for over 240 km (150 mi), with surface displacements of several meters.Fusakichi OmoriFusakichi Omori (大森 房吉, Ōmori Fusakichi; 30 October 1868 – 8 November 1923) was a pioneer Japanese seismologist, second chairman of seismology at Tokyo Imperial University and president of the Japanese Imperial Earthquake Investigation Committee. Omori is also known for his observation describing the aftershock rate of earthquakes, now known as Omori's law.EarthquakeSudden movement of the Earth's crustEarthquake epicenters occur mostly along tectonic plate boundaries, especially on the Pacific Ring of Fire.An earthquake, also called a quake, tremor, or temblor, is the shaking of the Earth's surface resulting from a sudden release of energy in the lithosphere that creates seismic waves.EpicenterThe epicenter (), epicentre, or epicentrum in seismology is the point on the Earth's surface directly above a hypocenter or focus, the point where an earthquake or an underground explosion originates. DeterminationThe primary purpose of a seismometer is to locate the initiating points of earthquake epicenters. The secondary purpose, of determining the 'size' or magnitude must be calculated after the precise location is known.StochasticStochasticity is the property of being well-described by a randomprobability distribution. Stochasticity and randomness are technically distinct concepts: stochasticity refers to a modeling approach, while randomness describes phenomena. These terms are often used interchangeably. In probability theory, the formal concept of a stochastic process is also referred to as a random process.Tokuji UtsuTokuji Utsu (Japanese: 宇津 徳治, April 13, 1928 – August 18, 2004) was a Japanese seismologist and Professor Emeritus of University of Tokyo. He graduated from the Faculty of Science at the University of Tokyo in 1951 and became a professor at the Earthquake Research Institute, University of Tokyo in 1977. Utsu was compiling "Catalog of Damaging Earthquakes in the World". He received the Medal with Purple Ribbon, the Order of the Sacred Treasure, 2nd class and so on.2004 Indian Ocean earthquake and tsunamiOn 26 December 2004, at 07:58:53 local time (UTC+7), a Mw 9.2–9.3 earthquake struck with its epicenter off the west coast of Aceh, in northern Sumatra, Indonesia. The underseamegathrust earthquake, known in the scientific community as the Sumatra–Andaman earthquake, was caused by a rupture along the fault boundary between the Burma plate and the Indian plate, and reached a maximum Mercalli intensity of IX in some areas.MainshockIn seismology, the mainshock is the largest earthquake in a sequence, sometimes preceded by one or more foreshocks, and almost always followed by many aftershocks.SeismologySeismology (; from Ancient Greek σεισμός (seismós), meaning 'earthquake', and -λογία (-logía), meaning 'study of') is the scientific study of earthquakes (or generally, quakes) and the generation and propagation of elastic waves through planetary bodies.WaveformIn electronics, acoustics, and related fields, the waveform of a signal is the shape of its graph as a function of time, independent of its time and magnitudescales and of any displacement in time. Periodic waveforms repeat regularly at a constant period. The term can also be used for non-periodic or aperiodic signals, like chirps and pulses. In electronics, the term is usually applied to time-varying voltages, currents, or electromagnetic fields.Crust (geology)In geology, the crust is the outermost solid shell of a planet, dwarf planet, or natural satellite. It is usually distinguished from the underlying mantle by its chemical makeup; however, in the case of icy satellites, it may be defined based on its phase (solid crust vs. liquid mantle).*As an Amazon Associate I earn from qualifying purchases.