نتایج جستجو برای: mainshock
تعداد نتایج: 432 فیلتر نتایج به سال:
The observation of foreshocks preceding large earthquakes and the suggestion that foreshocks have specific properties that may be used to distinguish them from other earthquakes have raised the hope that large earthquakes may be predictable. Among proposed anomalous properties are the larger proportion than normal of large versus small foreshocks, the power law acceleration of seismicity rate a...
For a decade, the U.S. Geological Survey has used the Parkfield Earthquake Prediction Experiment scenario document to estimate the probability that earthquakes observed on the San Andreas fault near Parkfield will turn out to be foreshocks followed by the expected magnitude 6 mainshock. During this time, we have learned much about the seismogenic process at Parkfield, about the long-term probab...
the andeka earthquake of 25/09/2002 (mw = 5.6) shocked the northeast region of the city of masjed-soleyman in zagros folded belt. the event caused no life loss but 4 people were reported to be injured. the quake occurred in the southern parts of the zagros belt in an oil-rich area. no damage could be observed in the masjed-soleyman dam site, which is the most important hydroelectric infrastruct...
The magnitude 7.3 Landers earthquake of 28 June 1992 triggered a remarkably sudden and widespread increase in earthquake activity across much of the western United States. The triggered earthquakes, which occurred at distances up to 1250 kilometers (17 source dimensions) from the Landers mainshock, were confined to areas of persistent seismicity and strike-slip to normal faulting. Many of the t...
[1] The September 25, 1999 Chi-Chi Taiwan aftershock (Mw=6.4) occurred on a down dip extension of the fault ruptured in the mainshock. Strong motion data were used to invert for the finite-source process and test for the causative fault plane. We performed a grid-search over a range of focal mechanisms and found a preferred model (strike=5 , dip=30 , slip=100 ) different from teleseismic studie...
The 2016 Kumamoto earthquake (Mw 7.0) occurred in the central part of Kyushu Island, southwestern Japan, on April 16, 2016. The mainshock triggered an event of maximum acceleration 700 gal that caused severe damage to infrastructure and thousands of homes. We investigate the source location of the triggered event, and the timing of large energy release, by employing the back-projection method f...
Spatiotemporal correlations of the two-dimensional spring-block (Burridge-Knopoff) model of earthquakes are extensively studied by means of numerical computer simulations. The model is found to exhibit either a " subcritical " , " supercritical " or " near-critical " behavior, depending on the values of the model parameters. Transition between the " subcritical " and " su-percritical " regimes ...
this paper focuses on aftershocks behavior and seismicity along some co-seismic faults for large earthquakes in iran. the data of aftershocks and seismicity roughly extracted from both the institute of geophysics the university of tehran (igut) and international seismological center (isc) catalogs. apply some essential methods on 43 large earthquakes data; like the depth, magnitude as well as t...
Using the simple ETAS branching model of seismicity, which assumes that each earthquake can trigger other earthquakes, we quantify the role played by the cascade of triggered seismicity in controlling the rate of aftershock decay as well as in the overall level of seismicity in the presence of a constant external seismicity source. We show that, in this model, the proportion of triggered seismi...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید