Relocation of aftershocks, focal mechanisms and stress inversion:
... historical times (Rajendran and Rajendran, 2001). It has been inferred, based on the radiocarbon dating, that an earthquake occurred between A.D. 885–1035 along the Allah Bund fault (Rajendran and Rajendran, 2001). In 1668, a moderate earthquake occurred west of Kachchh, with an epicenter at 24° N 6 ...
... historical times (Rajendran and Rajendran, 2001). It has been inferred, based on the radiocarbon dating, that an earthquake occurred between A.D. 885–1035 along the Allah Bund fault (Rajendran and Rajendran, 2001). In 1668, a moderate earthquake occurred west of Kachchh, with an epicenter at 24° N 6 ...
Geodynamics of the Wadati-Benioff zone earthquakes - Earth
... shown in Figure 5b on a vertical section of the focal sphere normal to the strike. Because of the low dip angle of 8° one speaks of a sub-horizontal slip. The value of ≈ 30.0 km was assigned to the focal depth. Because of the low dip angle, the shallow focal depth and the fault width of 100-200 km t ...
... shown in Figure 5b on a vertical section of the focal sphere normal to the strike. Because of the low dip angle of 8° one speaks of a sub-horizontal slip. The value of ≈ 30.0 km was assigned to the focal depth. Because of the low dip angle, the shallow focal depth and the fault width of 100-200 km t ...
Earthquake Source Fault Beneath Tokyo
... top of this plate, 4 to 26 kilometers, is much shallower than previous estimates based on the distribution of seismicity. This shallower plate geometry changes the location of maximum finite slip of the 1923 Kanto earthquake and will affect estimations of strong ground motion for seismic hazards ana ...
... top of this plate, 4 to 26 kilometers, is much shallower than previous estimates based on the distribution of seismicity. This shallower plate geometry changes the location of maximum finite slip of the 1923 Kanto earthquake and will affect estimations of strong ground motion for seismic hazards ana ...
A first-order second-moment calculation for seismic hazard
... (shown in Fig. 1) displaying the probability distribution of Mw , considering the uncertainty of conversion or the model error of the empirical relationship. This study aims to consider this additional source of uncertainty to estimate the annual rate of earthquake motion (or seismic hazard) on a pr ...
... (shown in Fig. 1) displaying the probability distribution of Mw , considering the uncertainty of conversion or the model error of the empirical relationship. This study aims to consider this additional source of uncertainty to estimate the annual rate of earthquake motion (or seismic hazard) on a pr ...
A SEMI-MARKOV MODEL FOR CHARACTERIZING RECURRENCE
... However, these models are not adequate to characterize the location-specific occurrences of great earthquakes. While a Poisson process does provide estimates of the probability of occurrence of great earthquakes of any size or the formation of a seismic gap which may be characteristic of a whole reg ...
... However, these models are not adequate to characterize the location-specific occurrences of great earthquakes. While a Poisson process does provide estimates of the probability of occurrence of great earthquakes of any size or the formation of a seismic gap which may be characteristic of a whole reg ...
Vertical and Horizontal Seismic Impedance Moments, and Corner
... Where Miox = horizontal seismic impedance moment in N-m. The value obtained from Eqn. (3.5) could be used to compare with the mantle magnitude M m (Okal and Talandier, 1989, and 1990). The effects of impedance factors on moment magnitudes based on the velocity of Love wave can be estimated by replac ...
... Where Miox = horizontal seismic impedance moment in N-m. The value obtained from Eqn. (3.5) could be used to compare with the mantle magnitude M m (Okal and Talandier, 1989, and 1990). The effects of impedance factors on moment magnitudes based on the velocity of Love wave can be estimated by replac ...
8.1 What Is an Earthquake?
... Before the great 1906 San Francisco earthquake, the actual causes and effects of earthquakes were not understood. The San Fransisco earthquake caused horizontal shifts in Earth’s surface of several meters along the northern portion of the San Andreas Fault. The 1300-kilometer San Andreas fracture ex ...
... Before the great 1906 San Francisco earthquake, the actual causes and effects of earthquakes were not understood. The San Fransisco earthquake caused horizontal shifts in Earth’s surface of several meters along the northern portion of the San Andreas Fault. The 1300-kilometer San Andreas fracture ex ...
Aftershock activity of the 2015 Gorkha, Nepal
... in the eastern part of the focal region, corresponding to the eastern edge of the relatively large coseismic slip region (e.g., Kobayashi et al. 2015, Yagi and Okuwaki 2015). Lower aftershock activity on the northwestern part of the focal region was also identified. The maximum coseismic slip there ...
... in the eastern part of the focal region, corresponding to the eastern edge of the relatively large coseismic slip region (e.g., Kobayashi et al. 2015, Yagi and Okuwaki 2015). Lower aftershock activity on the northwestern part of the focal region was also identified. The maximum coseismic slip there ...
EARTHQUAKE VULNERABILITY MAPPING OF RESIDENTIAL BUILDINGS BASED ON
... Indonesia is located between three junction of active tectonic plates tend to have high susceptibility of tectonic earthquakes occurrence. Earthquake can occur anytime in Indonesia. It was proved, on May 27, 2006 big earthquake was occur in Yogyakarta, located in the northern zone of the Eurasian Pl ...
... Indonesia is located between three junction of active tectonic plates tend to have high susceptibility of tectonic earthquakes occurrence. Earthquake can occur anytime in Indonesia. It was proved, on May 27, 2006 big earthquake was occur in Yogyakarta, located in the northern zone of the Eurasian Pl ...
Earthquake-Tsunami in South Jogjakarta Indonesia
... historical data shows the earthquake-tsunami events in the southern part of Java Island is considered high. If an earthquake’s epicenter is located near the Java trough with a shallow depth, potentially “tsunami earthquake” will happen, with relatively slow shaking but higher tsunamis in coastal are ...
... historical data shows the earthquake-tsunami events in the southern part of Java Island is considered high. If an earthquake’s epicenter is located near the Java trough with a shallow depth, potentially “tsunami earthquake” will happen, with relatively slow shaking but higher tsunamis in coastal are ...
S mid Niigata Prefecture Earthquake (M6.8) Satoshi Matsumoto , Yoshihisa Iio
... length of 4 seconds by the AGC. The pass band frequency of the filter is from 4 to 20 Hz. The output signals from this procedure are applied with normal moveout processing (NMO), which are frequently used in studies of seismic exploration. For an NMO, it is assumed that the seismic signal in horizon ...
... length of 4 seconds by the AGC. The pass band frequency of the filter is from 4 to 20 Hz. The output signals from this procedure are applied with normal moveout processing (NMO), which are frequently used in studies of seismic exploration. For an NMO, it is assumed that the seismic signal in horizon ...
estimating the strong-motion of the december 26, 2003 bam (iran)
... During the past decades, much effort has been given in reliable simulation of strong ground motion that include theoretical or semi-empirical modeling of the parameters affecting the shape, the duration and the frequency content of strong motion records. These methods is based on the stochastic poin ...
... During the past decades, much effort has been given in reliable simulation of strong ground motion that include theoretical or semi-empirical modeling of the parameters affecting the shape, the duration and the frequency content of strong motion records. These methods is based on the stochastic poin ...
Full text
... the Earth tide and earthquake occurrence, while it may deviate from 1.0 when there is a significant correlation. A high value of the O/S ratio means that the corresponding azimuth is preferred by earthquake occurrence. For the Southwestern Off Hokkaido subregion (Fig. 3(c)), the O/S ratio distribute ...
... the Earth tide and earthquake occurrence, while it may deviate from 1.0 when there is a significant correlation. A high value of the O/S ratio means that the corresponding azimuth is preferred by earthquake occurrence. For the Southwestern Off Hokkaido subregion (Fig. 3(c)), the O/S ratio distribute ...
ARTICLES - Lamont-Doherty Earth Observatory
... Recordings of accelerations greater than 1g are rare, but they may not be anomalous at locations within a few kilometres of fault ruptures. Preliminary seismic slip models (see Fig. 3d for example) indicate slip was concentrated in two small regions, near the stations recording the strongest PGA. Th ...
... Recordings of accelerations greater than 1g are rare, but they may not be anomalous at locations within a few kilometres of fault ruptures. Preliminary seismic slip models (see Fig. 3d for example) indicate slip was concentrated in two small regions, near the stations recording the strongest PGA. Th ...
2008 Sichuan earthquake
The 2008 Sichuan earthquake or the Great Sichuan earthquake, measured at 8.0 Msand 7.9 Mw, and occurred at 02:28:01 PM China Standard Time at epicenter (06:28:01 UTC)on Monday, May 12 in Sichuan province, killed 69,197 people and left 18,222 missing.It is also known as the Wenchuan earthquake (Chinese: 汶川大地震; pinyin: Wènchuān dà dìzhèn; literally: ""Great Wenchuan earthquake""), after the location of the earthquake's epicenter, Wenchuan County, Sichuan. The epicenter was 80 kilometres (50 mi) west-northwest of Chengdu, the provincial capital, with a focal depth of 19 km (12 mi).The earthquake was also felt in nearby countries and as far away as both Beijing and Shanghai—1,500 km (930 mi) and 1,700 km (1,060 mi) away—where office buildings swayed with the tremor. Strong aftershocks, some exceeding magnitude 6, continued to hit the area even months after the main quake, causing new casualties and damage.Official figures (as of July 21, 2008 12:00 CST) stated that 69,197 were confirmed dead, including 68,636 in Sichuan province, and 374,176 injured, with 18,222 listed as missing. The earthquake left about 4.8 million people homeless, though the number could be as high as 11 million. Approximately 15 million people lived in the affected area. It was the deadliest earthquake to hit China since the 1976 Tangshan earthquake, which killed at least 240,000 people, and the strongest in the country since the 1950 Chayu earthquake, which registered at 8.5 on the Richter magnitude scale. It is the 21st deadliest earthquake of all time. On November 6, 2008, the central government announced that it would spend 1 trillion RMB (about US $146.5 billion) over the next three years to rebuild areas ravaged by the earthquake, as part of the Chinese economic stimulus program.