report
... paleoearthquakes occurred on the Reelfoot fault, with the timing of the paleoearthquakes independently determined from paleoliquefaction features and fault scarp trenching. It appears that the meandering river straightened as a result of changes in the ground elevation due to movement of the fault. ...
... paleoearthquakes occurred on the Reelfoot fault, with the timing of the paleoearthquakes independently determined from paleoliquefaction features and fault scarp trenching. It appears that the meandering river straightened as a result of changes in the ground elevation due to movement of the fault. ...
Earthquake Disaster Guidelines - National Disaster Management
... Preparation of guidelines for various types of disasters forms an important part of the mandate of the National Disaster Management Authority (NDMA). Almost 59 percent of the landmass of India is prone to earthquakes and preparation in this regard constitutes an important part of our effort for bett ...
... Preparation of guidelines for various types of disasters forms an important part of the mandate of the National Disaster Management Authority (NDMA). Almost 59 percent of the landmass of India is prone to earthquakes and preparation in this regard constitutes an important part of our effort for bett ...
Recipe for Predicting Strong Ground Motion from Crustal
... The size and stress drop of asperity are significant parameters for predicting strong ground motion. Using the stress drop for a single-crack (circular) model D rc (Eq. 1) by ESHELBY (1957), the stress drop of the asperity Dra is estimated following MADARIAGA (1979) or DAS and KOSTROV (1986) and gi ...
... The size and stress drop of asperity are significant parameters for predicting strong ground motion. Using the stress drop for a single-crack (circular) model D rc (Eq. 1) by ESHELBY (1957), the stress drop of the asperity Dra is estimated following MADARIAGA (1979) or DAS and KOSTROV (1986) and gi ...
Inferring fault strength from earthquake rupture properties and the tectonic
... Dilatant slip associated with large earthquakes shatters the impermeable barrier, allowing fluid flow and fast diffusion to reduce fluid pressures. The pre-seismic low permeability fault zone switches to a post-seismic highly permeable channel for expulsion of mantle fluids and rapid in-plane pressu ...
... Dilatant slip associated with large earthquakes shatters the impermeable barrier, allowing fluid flow and fast diffusion to reduce fluid pressures. The pre-seismic low permeability fault zone switches to a post-seismic highly permeable channel for expulsion of mantle fluids and rapid in-plane pressu ...
KeyGraph as Risk Explorer in Earthquake-Sequence
... detecting hidden causalities among land crust movements and activities of faults. Hereafter, we call our system Fatal Fault Finder or F3 in short. F3 finds risky faults by applying KeyGraph, which was originally presented as a document-indexing algorithm (Ohsawa, 1998), not to a document but to a se ...
... detecting hidden causalities among land crust movements and activities of faults. Hereafter, we call our system Fatal Fault Finder or F3 in short. F3 finds risky faults by applying KeyGraph, which was originally presented as a document-indexing algorithm (Ohsawa, 1998), not to a document but to a se ...
Seismotectonic modeling of the repeating Katsuhiko Ishibashi
... on the issues of the two continental plates because they are controversial and not important in this paper). The PAC plate is being subducted beneath both northeast Japan and the PHS plate west-northwestward at the Japan and Izu-Bonin trenches. Due to this subduction, the eastern margin of the PHS p ...
... on the issues of the two continental plates because they are controversial and not important in this paper). The PAC plate is being subducted beneath both northeast Japan and the PHS plate west-northwestward at the Japan and Izu-Bonin trenches. Due to this subduction, the eastern margin of the PHS p ...
Anomalous soil radon fluctuations – signal of earthquakes in Nepal
... gas and reported anomalous radon concentration changes prior to the strong earthquake of magnitude M8.0 that occurred at Tonankai. Since then, the study of radon anomaly in sub-soil gas, thermal spring and ground water has been undertaken significantly by researchers all around the globe. Fleischer a ...
... gas and reported anomalous radon concentration changes prior to the strong earthquake of magnitude M8.0 that occurred at Tonankai. Since then, the study of radon anomaly in sub-soil gas, thermal spring and ground water has been undertaken significantly by researchers all around the globe. Fleischer a ...
Probabilistic seismic hazard analysis
... particular, insight into the relationship between different source and site characteristics and resulting ground motion parameters, an understanding that plays a pivotal role in determining appropriate design ground motions. ...
... particular, insight into the relationship between different source and site characteristics and resulting ground motion parameters, an understanding that plays a pivotal role in determining appropriate design ground motions. ...
Climate change and Urban Vulnerability in Africa
... The constant b is typically equal to 1.0 in seismically active regions. This means that for every magnitude 4.0 event there will be 10 magnitude 3.0 quakes and 100 magnitude 2.0 quakes. There is some variation with b-values in the range 0.5 to 1.5 depending on the tectonic environment of the region. ...
... The constant b is typically equal to 1.0 in seismically active regions. This means that for every magnitude 4.0 event there will be 10 magnitude 3.0 quakes and 100 magnitude 2.0 quakes. There is some variation with b-values in the range 0.5 to 1.5 depending on the tectonic environment of the region. ...
Research on the Seismic Activity of the Lower Yangtze River
... earthquake data,seismic activities are intensive in this seismic zone,characterized by moderatestrong earthquakes. Once an earthquake occurs,development of economy and stability of society will be seriously affected. Therefore,research on seismic activity of this zone is significant. Research has be ...
... earthquake data,seismic activities are intensive in this seismic zone,characterized by moderatestrong earthquakes. Once an earthquake occurs,development of economy and stability of society will be seriously affected. Therefore,research on seismic activity of this zone is significant. Research has be ...
Repeating earthquakes in the Yellowstone volcanic field
... In Fig. 1B, the clustering criterion defines two earthquakes as a doublet if the cross-correlation coefficient between their waveforms is 0.85 or higher on at least two stations (green links on Fig. 1B). The dominant frequencies of the Yellowstone earthquake data used in the study are from 0.8 to ~ 8 ...
... In Fig. 1B, the clustering criterion defines two earthquakes as a doublet if the cross-correlation coefficient between their waveforms is 0.85 or higher on at least two stations (green links on Fig. 1B). The dominant frequencies of the Yellowstone earthquake data used in the study are from 0.8 to ~ 8 ...
Global Strategy of JCI on ISO Standard for Seismic Evaluation and
... suffered big damage by 1968 Tokachi-oki earthquake and 1978 Miyagi-ken-oki earthquake. This can be similar by lognormality distribution like line 3, too. It is found there is no buildings whose Is is above 0.6 suffered big damage. ...
... suffered big damage by 1968 Tokachi-oki earthquake and 1978 Miyagi-ken-oki earthquake. This can be similar by lognormality distribution like line 3, too. It is found there is no buildings whose Is is above 0.6 suffered big damage. ...
P from the 2011 Tohoku-Oki earthquake Masatoshi Miyazawa
... seismic events triggered by the first arriving P-waves over Japan. This method uses a reference event to correct for source and propagation effects, so that the local response near the station can be examined in detail. P-wave triggering was found in the regions where triggered non-volcanic tremor ( ...
... seismic events triggered by the first arriving P-waves over Japan. This method uses a reference event to correct for source and propagation effects, so that the local response near the station can be examined in detail. P-wave triggering was found in the regions where triggered non-volcanic tremor ( ...
MEASUREMENT OF SOLUBLE RADON IN JOOSHAN SPA (SE OF
... Also, based on Eq.1 an impact factor value is achieved dividing Dobrovolsky value (D) by distance between each earthquake’s epicenters to spa location (R) as D/R. This factor indicates the range of ability and reliability of each earthquake to apply as a precursor in a study area (Fig.3). Based on p ...
... Also, based on Eq.1 an impact factor value is achieved dividing Dobrovolsky value (D) by distance between each earthquake’s epicenters to spa location (R) as D/R. This factor indicates the range of ability and reliability of each earthquake to apply as a precursor in a study area (Fig.3). Based on p ...
Relocation of large intermediate-depth earthquakes in the Vrancea
... there was a 30% probability that a M ≥ 7.0 earthquake will occur during a 5-year period starting in 2005. In general, long-term earthquake predictions are based on the regularity of earthquake occurrences and a seismic gap model (e.g. Fedotov, 1965; Sykes, 1971). Such an approach is particularly rel ...
... there was a 30% probability that a M ≥ 7.0 earthquake will occur during a 5-year period starting in 2005. In general, long-term earthquake predictions are based on the regularity of earthquake occurrences and a seismic gap model (e.g. Fedotov, 1965; Sykes, 1971). Such an approach is particularly rel ...
August 2007
... Education and Awareness Committee Diane dePolo reported that various members of the Council have been contacted about an emergency preparedness calendar, to be prepared by a graduate student from UNR for Washoe County. Following input from Council members, the County plans to focus on earthquakes in ...
... Education and Awareness Committee Diane dePolo reported that various members of the Council have been contacted about an emergency preparedness calendar, to be prepared by a graduate student from UNR for Washoe County. Following input from Council members, the County plans to focus on earthquakes in ...
Earthquake forecasting and its verification
... seismographic areas. About a million magnitude two earthquakes occur each year on our planet. In southern California about a thousand magnitude two earthquakes occur each year. Except for the aftershocks of large earthquakes, such as the 1992 M=7.3 Landers earthquake, this seismic activity is essent ...
... seismographic areas. About a million magnitude two earthquakes occur each year on our planet. In southern California about a thousand magnitude two earthquakes occur each year. Except for the aftershocks of large earthquakes, such as the 1992 M=7.3 Landers earthquake, this seismic activity is essent ...
Long-term creep-rate changes and their causes
... creepmeters that extend along about 30 km of the fault. Two of them (CWC3 and CWN1) are nearly co-located, separated by only 30 meters within a winery building. Figure 1 also shows the locations of a number of earthquakes that occurred on the San Andreas fault between 1960 and 2003. The largest of t ...
... creepmeters that extend along about 30 km of the fault. Two of them (CWC3 and CWN1) are nearly co-located, separated by only 30 meters within a winery building. Figure 1 also shows the locations of a number of earthquakes that occurred on the San Andreas fault between 1960 and 2003. The largest of t ...
Are earthquakes predictable? - San Andreas UCLA Seismic
... contribute to confusion and difficulty in prediction research. (1) The above definition, as well as the discussion by Wallace et a/. (1984), confirms that major effort has been directed towards predicting a speczjic individual earthquake, in other words a forecast is envisioned as the determination ...
... contribute to confusion and difficulty in prediction research. (1) The above definition, as well as the discussion by Wallace et a/. (1984), confirms that major effort has been directed towards predicting a speczjic individual earthquake, in other words a forecast is envisioned as the determination ...
Evidence of a recent magma dike intrusion at the slow spreading
... [Dziak and Fox, 1999; Tolstoy et al., 2001]. [9] The hydroacoustic earthquake source locations were estimated from the hydrophone data using an iterative nonlinear regression algorithm. The algorithm minimizes the error between observed and predicted travel time by incrementing an event’s latitude, ...
... [Dziak and Fox, 1999; Tolstoy et al., 2001]. [9] The hydroacoustic earthquake source locations were estimated from the hydrophone data using an iterative nonlinear regression algorithm. The algorithm minimizes the error between observed and predicted travel time by incrementing an event’s latitude, ...
natural disasters: earthquakes
... some of the ideas that fed into the resource. Thanks to Tony Cassidy for inspiration for the emotion line resource idea that was adapted for one of the sessions. Thanks also Ben Hennig for use of his cartography, particularly the earthquake risk map. Thanks to Helen Davis and Lucy Tutton from the Br ...
... some of the ideas that fed into the resource. Thanks to Tony Cassidy for inspiration for the emotion line resource idea that was adapted for one of the sessions. Thanks also Ben Hennig for use of his cartography, particularly the earthquake risk map. Thanks to Helen Davis and Lucy Tutton from the Br ...
OBSERVED BEHAVIOR OF SEISMICALLY ISOLATED BUILDINGS
... Fig. 2(a) shows first-mode shapes for the Whittier and Landers earthquakes established from CEM analysis results. Significant isolator flexibility is apparent in both earthquakes but is most pronounced during the relatively strong shaking of the Landers event. Time varying first-mode shapes establis ...
... Fig. 2(a) shows first-mode shapes for the Whittier and Landers earthquakes established from CEM analysis results. Significant isolator flexibility is apparent in both earthquakes but is most pronounced during the relatively strong shaking of the Landers event. Time varying first-mode shapes establis ...
Surface Deformation and Seismic Rebound: Implications and
... intrinsic mode functions (IMFs) depending upon energy characteristics to achieve the Hilbert transform. In EMD, sifting plays an important role to exact IMFs (Huang et al. 1998); here, every point of analyzed data is subtracted by averages of envelopes, which are computed by local maxima and minima ...
... intrinsic mode functions (IMFs) depending upon energy characteristics to achieve the Hilbert transform. In EMD, sifting plays an important role to exact IMFs (Huang et al. 1998); here, every point of analyzed data is subtracted by averages of envelopes, which are computed by local maxima and minima ...
Time-dependent analysis of aftershock events and structural impacts
... Aftershock data (Fig. 2) reveals that intraplate nature of the Van earthquake can’t be explained with linearly uniform, elastic fracture mechanics, because the time delays between the observed individual clusters in aftershock seismicity are too long to result from elastic processes. It is clear tha ...
... Aftershock data (Fig. 2) reveals that intraplate nature of the Van earthquake can’t be explained with linearly uniform, elastic fracture mechanics, because the time delays between the observed individual clusters in aftershock seismicity are too long to result from elastic processes. It is clear tha ...
Casualties of the 2010 Haiti earthquake
Casualties of the 2010 Haiti earthquake include both civilian and government officials, locals and foreigners – however the overwhelming majority of those killed and wounded in the quake were Haitian civilians. A number of public figures died in the earthquake, including government officials, clergy members, musicians, together with foreign civilian and military personnel working with the United Nations. On 15 January, the Red Cross estimated the death toll at between 45,000 and 50,000, however by 24 January, Communications Minister Marie-Laurence Jocelyn Lassegue said the death toll was over 150,000 in the Port-au-Prince metropolitan area alone. Haitian president René Préval reported on 27 January that ""nearly 170,000"" bodies had been counted.On 21 February, Preval raised that estimate to 300,000. In February, prime minister Jean-Max Bellerive estimated that 300,000 had been injured. Speaking in Miami in June 2010, Bellerive also estimated the number of deaths had been 300,000. On the first anniversary of the quake, Bellerive raised the death toll to 316,000. He said that was, in part, because of the recovery of additional bodies. A University of Michigan study in 2010 estimated about 160,000 deaths.