Earthquake Hazard in the Tehran Region based on the Characteristic Earthquake Model

2017 ◽  
Vol 23 (9) ◽  
pp. 1485-1511 ◽  
Author(s):  
Hamid Zafarani ◽  
Babak Hajimohammadi ◽  
Seyed Mostafa Jalalalhosseini
Keyword(s):  
Earthquake Hazard ◽  
Characteristic Earthquake ◽  
Tehran Region ◽  
Earthquake Model

The Gutenberg-Richter or characteristic earthquake distribution, which is it?

1994 ◽  
Vol 84 (6) ◽  
pp. 1940-1959 ◽  
Author(s):  
Steven G. Wesnousky
Keyword(s):  
Seismic Hazard ◽  
Hazard Analysis ◽  
Slip Rate ◽  
Historical Earthquakes ◽  
Practical Implementation ◽  
Characteristic Earthquake ◽  
Earthquake Model ◽  
Earthquake Distribution ◽  
Fault Trace ◽  
Major Strike

Abstract Paleoearthquake and fault slip-rate data are combined with the CIT-USGS catalog for the period 1944 to 1992 to examine the shape of the magnitude-frequency distribution along the major strike-slip faults of southern California. The resulting distributions for the Newport-Inglewood, Elsinore, Garlock, and San Andreas faults are in accord with the characteristic earthquake model of fault behavior. The distribution observed along the San Jacinto fault satisfies the Gutenberg-Richter relationship. If attention is limited to segments of the San Jacinto that are marked by the rupture zones of large historical earthquakes or distinct steps in fault trace, the observed distribution along each segment is consistent with the characteristic earthquake model. The Gutenberg-Richter distribution observed for the entirety of the San Jacinto may reflect the sum of seismicity along a number of distinct fault segments, each of which displays a characteristic earthquake distribution. The limited period of instrumental recording is insufficient to disprove the hypothesis that all faults will display a Gutenberg-Richter distribution when averaged over the course of a complete earthquake cycle. But, given that (1) the last 5 decades of seismicity are the best indicators of the expected level of small to moderate-size earthquakes in the next 50 years, and (2) it is generally about this period of time that is of interest in seismic hazard and engineering analysis, the answer to the question posed in the title of the article, at least when concerned with practical implementation of seismic hazard analysis at sites along these major faults, appears to be the “characteristic earthquake distribution.”

scholarly journals Characteristic Earthquake Model, 1884-2011, R.I.P.

2012 ◽  
Vol 83 (6) ◽  
pp. 951-953 ◽  
Author(s):  
Y. Y. Kagan ◽  
D. D. Jackson ◽  
R. J. Geller
Keyword(s):  
Characteristic Earthquake ◽  
Earthquake Model

Estimating of the b-Value Based on the Characteristic Earthquake Model

2021 ◽  
pp. 2150015
Author(s):  
Saman Yaghmaei-Sabegh ◽  
Gholamreza Ostadi-Asl
Keyword(s):  
Sample Size ◽  
Seismic Event ◽  
Tectonic Setting ◽  
B Value ◽  
Earthquake Precursor ◽  
Likelihood Method ◽  
Characteristic Earthquake ◽  
Proposed Model ◽  
Earthquake Model ◽  
Characteristic Earthquakes

[Formula: see text]-value of the Gutenberg–Richter relation as an earthquake precursor depends on the tectonic setting features. This paper presents an alternative method to calculate [Formula: see text]-value in the presence of characteristic earthquakes. The proposed equation is based on the maximum likelihood method applied on the probability density function of the characteristic earthquake model. Data from real and simulated catalogs were used to evaluate the accuracy of the proposed model. For this purpose, 224 seismic event catalogs with various properties including catalogs’ sample size, the ratios of characteristic earthquakes number to catalog’s sample size [Formula: see text] and different magnitude of characteristic earthquakes were simulated. According to the estimated [Formula: see text]-values, the earthquake occurrence probability was calculated and discussed. The results indicate that the proposed method of estimation for [Formula: see text]-value has more adaptable consideration of the characteristic earthquake behavior.

scholarly journals Geological and historical evidence of irregular recurrent earthquakes in Japan

2015 ◽  
Vol 373 (2053) ◽  
pp. 20140375 ◽  
Author(s):  
Kenji Satake
Keyword(s):  
Subduction Zones ◽  
Recurrence Interval ◽  
Japan Trench ◽  
Historical Records ◽  
Characteristic Earthquake ◽  
Tsunami Deposits ◽  
Great Earthquakes ◽  
Earthquake Model ◽  
Future Earthquake ◽  
Simple Characteristic

Great ( M ∼8) earthquakes repeatedly occur along the subduction zones around Japan and cause fault slip of a few to several metres releasing strains accumulated from decades to centuries of plate motions. Assuming a simple ‘characteristic earthquake’ model that similar earthquakes repeat at regular intervals, probabilities of future earthquake occurrence have been calculated by a government committee. However, recent studies on past earthquakes including geological traces from giant ( M ∼9) earthquakes indicate a variety of size and recurrence interval of interplate earthquakes. Along the Kuril Trench off Hokkaido, limited historical records indicate that average recurrence interval of great earthquakes is approximately 100 years, but the tsunami deposits show that giant earthquakes occurred at a much longer interval of approximately 400 years. Along the Japan Trench off northern Honshu, recurrence of giant earthquakes similar to the 2011 Tohoku earthquake with an interval of approximately 600 years is inferred from historical records and tsunami deposits. Along the Sagami Trough near Tokyo, two types of Kanto earthquakes with recurrence interval of a few hundred years and a few thousand years had been recognized, but studies show that the recent three Kanto earthquakes had different source extents. Along the Nankai Trough off western Japan, recurrence of great earthquakes with an interval of approximately 100 years has been identified from historical literature, but tsunami deposits indicate that the sizes of the recurrent earthquakes are variable. Such variability makes it difficult to apply a simple ‘characteristic earthquake’ model for the long-term forecast, and several attempts such as use of geological data for the evaluation of future earthquake probabilities or the estimation of maximum earthquake size in each subduction zone are being conducted by government committees.

Sign in / Sign up

Export Citation Format

Share Document