نتایج جستجو برای: rate of seismicity
تعداد نتایج: 21195197 فیلتر نتایج به سال:
Remote dynamic triggering occurred in the western United States and Greece following the following the Denali, Hector Mine, Landers, and Izmit mainshocks in seismically active, largely geothermal areas that experienced shaking from the mainshock typically exceeding 0.2 cm/sec. Because triggered earthquakes are small (often below Mw, 2), investigations of whether remote triggering is a generally...
The February 21, 2008, Wells earthquake (MW=6.0) occurred in a region of northeastern Nevada where the seismicity has historically been low relative to western Nevada. In a region of area of approximately10 5 km 2 of northeastern Nevada, based rates of smaller earthquakes in the region prior to 2008, earthquakes of MW=6.0 or larger are expected with a rate of about 0.01 per year. The probabilit...
The development of most unconventional oil and gas resources relies upon subsurface injection of very large volumes of fluids, which can induce earthquakes by activating slip on a nearby fault. During the last 5 years, accelerated oilfield fluid injection has led to a sharp increase in the rate of earthquakes in some parts of North America. In the central United States, most induced seismicity ...
[1] Most large earthquakes in northern and central California clustered along the main trace of the San Andreas Fault (SAF), the North American-Pacific plate boundary. However, in southern California earthquakes were rather scattered. Here we suggest that such alongstrike variation of seismicity may largely reflect the geometrical impact of the SAF. Using a dynamic finite element model that inc...
Hydroseismicity was proposed to explain the occurrence of intraplate earthquakes in regions. Koyna Warna region one of the reservoir triggered seismicity zone in India, which is an example of intraplate earthquake region. The seismicity is continuing after 45 years of impoundment of the Koyna reservoir in 1961 and 25 years of impoundment of Warna reservoir in 1985. The excess of previous maximu...
We analyse the statistical pattern of seismicity before a 1-2 10 m chalk cliff collapse on the Normandie ocean shore, Western France. We show that a power law acceleration of seismicity rate and energy in both 40 Hz-1.5 kHz and 2 Hz-10kHz frequency range, is defined on 3 order of magnitude, within 2 hours from the collapse time. Simultaneously, the average size of the seismic events increases t...
S U M M A R Y Motivated by a recent resurgence in earthquake predictability research, we present a method for testing alarm-based earthquake predictions. The testing method is based on the Molchan diagram—a plot of miss rate and fraction of space–time occupied by alarm—and is applicable to a wide class of predictions, including probabilistic earthquake forecasts varying in space, time, and magn...
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