Determination of earthquake epicentroids by inversion of gravity variation data in the BTTZ region, China

Kuo, John T.; Zheng, Jinhan; Song, Shangwu; Liu, K.R

doi:10.1016/s0040-1951(99)00201-2

Cited by 22 publications

(14 citation statements)

References 6 publications

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“…• The positive, or negative, summit of a RGC deformation is usually close to the epicenter (see Figs. 4−7 and Table 1 in case of A, C, F and H earthquakes), but there are also some exception with certain distance from the epicenter (see the pictures of B and G earthquakes) which might be explained by the study of Professor Kuo: in BTTZ region, epicenter usually locates at the fault end or its intersection while the epicentroid, which is the earth surface projection of the beneath mass center of emigrant mass, usually locates in a whole block (Kuo et al, 1999). From the study of a sample of 16 earthquakes (M > 4.0), the difference between the two is mostly in the range of 0−40 km (Zheng et al, 2003).…”

Section: Discussionmentioning

confidence: 99%

Earthquake-related gravity field changes at Beijing-Tangshan gravimetric network during 1987–1998

2009

Stud Geophys Geod

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Based on the 46 batch repeated observations of Beijing-Tangshan gravimetric network, the gravity field changes of the region during 1987−1998 have been determined. A comparison was made between the differences of these gravity field changes and the 8 reasonably large earthquake events (M b ≥ 4.0) in the region, showing the existence of the earthquake-related gravity field changes. It appears that there is usually a detectable change of a nearby gravity field well before an earthquake, followed by an opposite change afterwards.K e y w o r d s :

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Section: Discussionmentioning

confidence: 99%

Earthquake-related gravity field changes at Beijing-Tangshan gravimetric network during 1987–1998

2009

Stud Geophys Geod

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“…Although the potential of using gravity data for earthquake research was recognized nearly 50 years ago [13][14][15][16][17][18][19][20], there existed few cases demonstrating the usefulness of gravity monitoring data for useful earthquake forecast. Based on discussions presented above, we argue that information derived from large-scale regional gravity monitoring data has the potential to be used as a precursor for forecasting large earthquakes in a medium-term of no more than five years, particularly when that information is combined with expert knowledge about historic seismic activities, seismicity rate, as well as geological and tectonic conditions in the region in question.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

Medium-Term Earthquake Forecast Using Gravity Monitoring Data: Evidence from the Yutian and Wenchuan Earthquakes in China

Zhu

Zhan

2012

International Journal of Geophysics

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We review the gravity monitoring data and methods upon which the researchers reached these medium-term earthquake forecasts. Experience related to the medium-term forecasts of the Yutian and Wenchuan earthquakes suggests that gravity changes derived from regional gravity monitoring data could potentially be a useful medium-term precursor of large earthquakes, but significant additional research is needed to validate and evaluate this hypothesis.

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“…However, the gravity variation belts of transition for the gravity variation more likely correspond to a large earthquake. Kuo et al (1999) proposed a hypothesis named the epicentroid model (concept likened to hypocentroid) to explain this phenomena of gravity precursor.…”

Section: Gravity Data and Earthquake Cataloguementioning

confidence: 99%

Statistical Evaluation of Efficiency and Possibility of Earthquake Predictions with Gravity Field Variation and its Analytic Signal in Western China

Chen

Jiang

Zhuang

2015

Pure Appl. Geophys.

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This paper aimed at assessing gravity variations as precursors for earthquake prediction in the Tibet (Xizang)-QinghaiXinjiang-Sichuan Region, western China. We here take a statistical approach to evaluate efficiency and possibility of earthquake prediction. We used the most recent spatiotemporal gravity field variation datasets of 2002-2008 for the region that were provided by the Crustal Movement Observation Network of China (CMONC). The datasets were space sparse and time discrete. In 2007-2010, 13 earthquakes ([M s 6.0) occurred in the region. The observed gravity variations have a statistical correlation with the occurrence of these earthquakes through the Molchan error diagram tests that lead to alarms over a good fraction of space-time.The results show that the prediction efficiency of amplitude of analytic signal of gravity variations is better than seismicity rate model and THD and absolute value of gravity variation, implying that gravity variations before earthquake may include precursory information of future large earthquakes.

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Determination of earthquake epicentroids by inversion of gravity variation data in the BTTZ region, China

Cited by 22 publications

References 6 publications

Earthquake-related gravity field changes at Beijing-Tangshan gravimetric network during 1987–1998

Earthquake-related gravity field changes at Beijing-Tangshan gravimetric network during 1987–1998

Medium-Term Earthquake Forecast Using Gravity Monitoring Data: Evidence from the Yutian and Wenchuan Earthquakes in China

Statistical Evaluation of Efficiency and Possibility of Earthquake Predictions with Gravity Field Variation and its Analytic Signal in Western China

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