نتایج جستجو برای: mainshock

تعداد نتایج: 432  

Journal: :Journal Of Geophysical Research: Solid Earth 2022

Swarms are bursts of earthquakes without an obvious mainshock. Some have been observed to be associated with transient aseismic fault slip, while others thought related fluids. However, the association is rarely quantitative due insufficient data quality. We use high-quality GPS/GNSS, InSAR, and relocated seismicity study a swarm >2,000 which occurred between 30 September 6 October 2020, near W...

Journal: :Journal Of Geophysical Research: Solid Earth 2022

Static stress transfer from major earthquakes is commonly invoked as the primary mechanism for triggering aftershocks, but evaluating this depends on aftershock rupture plane orientations and hypocenter locations, which are often subject to significant observational uncertainty. We evaluate static change an unusually large data set comprising hundreds thousands of aftershocks following 1997 Umb...

Journal: :Structure and Infrastructure Engineering 2021

Ageing structures located in moderate to high seismicity regions are exposed multiple natural stressors during their lifetime. Large earthquake events coupled with environmental aggressive agents increase the progressive failure probability of these structures. The accumulated damage main event might be exacerbated by its following aftershocks. This result catastrophic structures, and consequen...

Journal: :Geoscience Letters 2021

Abstract This study comprehensively investigates the source mechanisms associated with mainshock and aftershocks of Mw = 6.3 Yogyakarta earthquake which occurred on May 27, 2006. The process involved using moment tensor inversion to determine fault plane parameters joint were further applied understand spatial temporal slip distributions during earthquake. Moreover, coseismal distribution was o...

Journal: :Earth and Planetary Science Letters 2021

Large earthquakes are capable of triggering microseismicity, deep tremor and slow-slip events from intermediate- to long-distance ranges. Unfortunately, earthquake catalogs typically incomplete right after large mainshocks. Hence, mapping patterns understanding the underlying mechanism challenging. Here we present two different types seismicity responses dynamic stressing by passing seismic wav...

Journal: :Journal Of Geophysical Research: Solid Earth 2021

Seismicity quiescences are best observed during sequences with multiple mainshocks and often emerge some delay after an initial phase of aftershock triggering. The mechanisms controlling this poorly understood, due to a lack systematic precise estimation the duration triggering which is made complicated by rapidly changing magnitude completeness mainshock. Here, we analyze how such delayed quie...

Due to low stiffness of braces after yielding, the structures with buckling-restrained braces (BRBs) experience high residual drifts during an earthquake, which can be intensified by aftershocks and causes considerable damages to structures. Also, due to poor distribution of stiffness, this problem is exacerbated for irregular structures. Recently, the yielding brace system (YBS) has been intro...

Journal: :Physical review letters 2010
M Bottiglieri L de Arcangelis C Godano E Lippiello

The interevent time distribution characterizes the temporal occurrence in seismic catalogs. Universal scaling properties of this distribution have been evidenced for entire catalogs and seismic sequences. Recently, these universal features have been questioned and some criticisms have been raised. We investigate the existence of universal scaling properties by analyzing a Californian catalog an...

2011
Dapeng Zhao Zhouchuan Huang Norihito Umino Akira Hasegawa Hiroo Kanamori

[1] The great 2011 Tohoku‐oki earthquake (Mw 9.0) and its 339 foreshocks and 5,609 aftershocks (9–27 March 2011) were relocated using a three‐dimensional seismic velocity model and local P and S wave arrival times. The distribution of relocated hypocenters was compared with a tomographic image of the Northeast Japan forearc. The comparison indicates that the rupture nucleation of the largest ev...

2015
Sang-Ho Yun Kenneth Hudnut Susan Owen Frank Webb Mark Simons Patrizia Sacco Eric Gurrola Gerald Manipon Cunren Liang Eric Fielding Pietro Milillo Alessandro Coletta

The 25 April 2015 Mw 7.8 Gorkha earthquake caused more than 8000 fatalities and widespread building damage in central Nepal. The Italian Space Agency’s COSMO–SkyMed Synthetic Aperture Radar (SAR) satellite acquired data over Kathmandu area four days after the earthquake and the Japan Aerospace Exploration Agency’s Advanced Land Observing Satellite-2 SAR satellite for larger area nine days after...

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