Aftershock Decay Rates in the Iranian Plateau

Ommi, S.; Zafarani, Hamid; Zaré, Mehdi

doi:10.1007/s00024-016-1285-0

Cited by 14 publications

(5 citation statements)

References 41 publications

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“…Mignan and Woessner, 2012]. This parameter was determined for different seismotectonic provinces of Iran by Mousavi et al [2014] and Ommi et al [2016]. In order to determine the spatial and temporal distributions of earthquakes, the seismic pattern, first the G-R law was investigated for each event and the a, b and parameters were calculated applying the ZMAP package Wiemer [2001] as shown in Figure 2.…”

Section: Decay Modelsmentioning

confidence: 99%

“…Iran large earthquakes aftershock sequences Also, Ommi et al [2016] found the parameters of the Omori law for the Ahar Varzegan earthquake as = 1.03, = 1.44, = 441 for aftershocks greater than 1.8 during 724 days after the mainshock. Farahani [2018] found = 0.95, = 0.037, = 12.79, for aftershocks larger than 3.4.…”

mentioning

confidence: 91%

“…More recent studies on the spatial and temporal analyses of the distribution of aftershock sequences carried on in different parts of the world; Wiemer and Katsumata [1999], Bayrak and Öztürk [2004], Öztürk et al [2008], Nuannin et al [2012] and Öztürk and Şahin [2019]. Ommi et al, [2016] determined the mean values of coefficients of the Omori law for 15 mainshock-aftershock sequences in different seismotectonic provinces of Iran. Also, Ansari [2017] studied the spatial and temporal seismicity parameters, stress state and seismic energy of the Shonbe earthquake sequence.…”

Section: Introductionmentioning

confidence: 99%

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Temporal properties of aftershock sequences of large earthquakes in Iran - Analysis of primary and secondary aftershocks of the Ezgeleh sequence

Lavasani

Shabani²

2020

Annals of Geophysics

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In this study, the decay of earthquake aftershock sequences of some major earthquakes in different tectonic regimes in the Iranian plateau is discussed. The studied earthquakes are Rigan [2010], Ahar-Varzaghan [2012], Goharan [2013], Sefidsang [2017] and Ezgeleh [2017]. The spatial and temporal windows are considered based on the method proposed by Gardner and Knopoff [1974] to compute decay parameters for each sequence. The decay rates of sequences were compared to well-known models to find the best fit for each sequence. The results showed that the modified Omori is the best fit for Ahar-Varzaghan and Ezgeleh sequences, for Rigan and Sefidsang sequences the modified Omori and the Kisslinger ones found as the best fits. The values of the p parameter of the Reasenberg and Shcherbakov models were larger compared to the Omori model, but the parameter of the Kisslinger model was slightly smaller compared to the Omori one. The c parameter showed an inverse relation to the threshold magnitude. The correlation between the p and c parameters and also the and the Gutenberg and Richter (G-R) parameters were investigated. In addition, we made use of a graphical method to analyze the seismic sequence of the Ezgeleh earthquake during 13 months after the main event. The graphical method was successful to estimate the occurrence of an event with an approximate magnitude of M=6.4 in the sequence.

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Section: Decay Modelsmentioning

confidence: 99%

mentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

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Temporal properties of aftershock sequences of large earthquakes in Iran - Analysis of primary and secondary aftershocks of the Ezgeleh sequence

Lavasani

Shabani²

2020

Annals of Geophysics

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“…Kamranzad et al (2015) andOmmi et al (2016) studied 14 and 15 seismic sequences, respectively, to study the aftershocks of the Iranian plateau. The range of p in these studies was determined from 0.39 to 2.7 and 0.85 to 2.7, respectively, and the range of k was obtained from 10 to 1427.4 and 10 to 441.1, respectively.…”

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confidence: 99%

Investigation of the reduction pattern of aftershocks in the Iranian plateau

Rostam

2022

Preprint

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The Iranian plateau is one of the most active and seismic areas, which is located in the Alpine-Himalayan seismic belt. This area has experienced many devastating earthquakes. The study of seismic behavior and the occurrence pattern of aftershocks of medium to large earthquakes can be important for this region. Twenty six earthquakes larger than 5 have been selected on the Iranian plateau in the last ten years to investigate their aftershocks behaviour. First the seismic parameters Mc, a and b-value were estimated by drawing the Gutenberg-Richter diagram using the maximum likelihood estimation method in ZMAP software. Then, events less than Mc were removed from the catalog. The remaining catalog was used to determine the parameters of modified Omori law for each event separately. The average value of p in Zagros and Alborz is 1.07, while this value is 0.99 for Central Iran and Kope Dagh. This can be caused by high seismic activity and rapid energy discharge by small earthquakes. Furthermore, in this study, a model for the distribution of the probability function of the waiting time of aftershock sequences of the Iranian plateau has been determined.

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“…nQ@vR}Q 10 11 Ovw}B R= xO=iDU= =@ nQ@vR}Q 'QwmPt VwQ QO "OQm`=O@= =yxrRrR |Ov@xWwN |= Q@ = Q |O}OH VwQ '=yO=ONQ pwL [1] "hwBwv QvOQ=o VwQ QO =yxQHvB O=a@= "1 pwOH =oQR@ QDtwr}m x@ pw] RwQ ?UL Q@ u=tR 2 5 19 5 6 3 0 22 5 11 5 3 5 26 22 4 0 30 42 4 5 35 83 5 0 40 155 5 5 47 290 6 0 54 510 6 5 61 790 7 0 70 915 7 5 81 960 8 0 94 985 xOW xO=iDU= u= Q}= |=yxrRrR |Ov@xWwN |= Q@ =yxRQrTB Q}oxty |r=wD pOt R= u; QO u= Q}= |=yxrRrR nwr=D=m |UQQ@ =@ u; QO xm OW=@ [16] [17] 'C}tU= QB wm w Rrw |}=[i |}xQHvB |xOWKqY= VwQ "2 'hwBwv QvOQ=o |v=tR |=yxQHvB ?=NDv= Q=F; w xOQw; CUOx@ [18] 'p=DvwQo w OQ=NQw@ VwQ "3 w xO=O Ow@y@ j} Q] wO x@ = Q j@=U |=yxw}W 'QwmPt u}=Q@=v@ w O};|t CUOx@ xOWVR= Q@ Q}oxty |r=wD pOt T=U= Q@ xOWxv}y@ |v=mt C=@U=Lt xD@r= "CU}v =yQDt=Q=B |= Q@ |Q=}DN= Q}O=kt uDiQo Q_vQO x@ |R=}v Qo}O [2] "nQ@vR}Q VwQ QO OQ=Ov=DU= |=yQDt= Q=B Q}O=kt "2 pwOH…”

mentioning

confidence: 99%

خوشه بندی کاتالوگ لرزه یی و مدل سازی پس لرزه ها با استفاده از مدل Etas

توکلی¹,

داودی²,

جلیلیان³

et al. 2019

مهندسی عمران

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Q}oxty |r=wD pOt '|}xQHvB pOt '|Ov@xWwN 'xrRrR nwr=D=m %|O}rm u=oS=w "|Qwt; |x]@= Q '=yxRQrTB xtOkt "1 R= =yxrRrR |Ov@xWwN |= Q@ [3] '2002 u= QoWywSB |NQ@ "OwW|t s=Hv= |r=tDL= Q}oxty |r=wD pOt l} VR= Q@ =@ QwmPt VwQ QO "OvOQm xO=iDU= |Q=t; |=ypOt |rY= |xrRrR l} xrRrR Qy xmv; p=tDL= '=yxrRrR |=yxO=O x@ 8 ETAS =yxRQrTB Ov}=Qi pOt |=v@t Q@ pOt u}= "O};|t CUOx@ 'OW=@ |Qo}O |xrRrR |xRQrTB =} 'O=ONQ l} xvwoJ xm OyO|t K}[wD w O@=}|t xaUwD |v=tR |}=[i |}xN=W |=yVywSB x@ O}v=wD|t QDW}@ |xar=]t |= Q@ Ovm|t ?aWvt = Q OwN |=yxN=WQ}R [124] "O}vm xaH=Qt 'xOWs=Hv= CQwY |v=OvJ C=ar=]t uwvm=D u= Q}= |}xRQr nwr=D=m |Ov@xWwN XwYN QO nQ@vR}Q |xrRrR |Ov@xWwN |=yVwQ [13] '2014 p=U QO |WywSB QO "CU= xDiQov w d=O |xBwm CN=Uu}tR |}xRQr |x}L=v pt=W u= Q}= Cqi p=tW |= Q@ p=DvwQo w xO=iDU= 'ZMAP Q= Ri=sQv R= u; QO w OvOW xU}=kt Qo}Om} =@ u=H}=@QP; RQ@r= u= Q}= |= Q@ xOW|Ov@xWwN nwr=D=m G= QNDU= x@ [15] '2015 p=U QO u}vJty [14] "OW 4222 w |kQW |xHQO 6642 |}=}i=QeH |xOwOLt |va} u; Qw=Ht |L=wv w xOt; CUOx@ pmWr=OLDt nwr=D=m "OW xDN=OQB 2012 p=U =D "s 4 uQk R= |r=tW hwBwv-QvOQ=o |v=mt |v=tR |xQHvB VwQ R= |a=O@= w |@}mQD |WwQ R= xO=iDU= =@ VwQ G}=Dv =@ pY=L |Ov@xWwN G}=Dv 'xU}=kt |= Q@ w OW |Ov@xWwN Qt=y VwQ w xm |OQwt =yvD O}=W "OvOW xU}=kt ZMAP |Q= Ri=sQv |xDU@ R= xO=iDU= =@ nQ@vR}Q |=yxrRrR "2 &pkDUt |=yxrRrR "1 %OQm |Ov@s}UkD xwQo wO QO u=wD|t = Q =yxrRrR =} 1 xv}W}B |xrRrR uwJty |v} w=va =@ = Q pkDUt |=yxrRrR "Qo}O |xrRrR x@ xDU@=w ' 4 xRQrV}B ' 3 xRQrTB = Q xDU@=w |=yxrRrR xm |r=L QO "OvQ@|t s=v 2 |rY= |xrRrR |Ov@xWwN R= |}=yv hOy u}=Q@=v@ "Ovt=v|t 6 xOW?aWvt =} 5 xOWxWwN |=yxrRrR QvOQ=o "CU= xOWQmP |=yxDUO x@ QwmPt |=yxrRrR |Ov@xk@] 'nwr=D=m l} |=yxrRrR x@ xDU@=w |v=mt w |v=tR pY=wi u}}aD R= xO=iDU= =@ [1] '1974 p=U QO hwBwv OQ@Q=m QB sD} Qwor= "OvOQm`=O@= = Q |v=mt |v=tR |xQHvB VwQ '=yxrRrR |=oQR@ |}xRQr |xWwN l} QO =yxRQrTB |=y?=aWv= =D OyO|t = Q xR=H= u}= [2] 'nQ@vR}Q xrRrR u} QDnQR@ \ki C}=yvQO 'xWwN l} h} QaD u=tR QO "O=O p=YD= Qo}Om} x@ = Q VwQ syt Q=}U@ |xaUwD "OwW|t xDiQo Q_v QO xWwN u; |rY= |xrRrR u=wvax@ u=}@ xm CU= 7 |Qwt; uwv=k |=v@t Q@ |v=mt |v=tR pY=wi R= xO=iDU= 'QwmPt =yxRQrTB O=OaD '|rY= |xrRrR`wkw u=tR x@ C@Uv u=tR uOW |QBU =@ Ovm|t w OvDUy |v}aD nQ@vR}Q w hwBwv QvOQ=o |=y sD} Qwor= "OQ=Po|t p=wR x@ wQ I}y uDiQoQ_vQO uwO@ xRQrTB w |rY= |xrRrR x@ =yxrRrR |Ov@xDUO =yu; QO

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Aftershock Decay Rates in the Iranian Plateau

Cited by 14 publications

References 41 publications

Temporal properties of aftershock sequences of large earthquakes in Iran - Analysis of primary and secondary aftershocks of the Ezgeleh sequence

Temporal properties of aftershock sequences of large earthquakes in Iran - Analysis of primary and secondary aftershocks of the Ezgeleh sequence

Investigation of the reduction pattern of aftershocks in the Iranian plateau

خوشه بندی کاتالوگ لرزه یی و مدل سازی پس لرزه ها با استفاده از مدل Etas

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