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yexuqing木蟲之王 (文學(xué)泰斗)
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極長程動態(tài)觸發(fā)作用導(dǎo)致泥火山活化與6級靜默斷層滑動
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Very-long-range dynamic triggering of mud volcano unrest and silent magnitude-6 fault slip 極長程動態(tài)觸發(fā)作用導(dǎo)致泥火山活化與6級靜默斷層滑動 ▲ 作者：Zaur Bayramov, Renier Viltres et al. ▲ 鏈接： https://www.science.org/doi/10.1126/science.adv8438 ▲ 摘要： 眾所周知，大地震產(chǎn)生的地震波能夠觸發(fā)遠(yuǎn)距離的斷層滑動，但其內(nèi)在機(jī)制尚不明確。通過采用干涉合成孔徑雷達(dá)技術(shù)并結(jié)合局部大地測量與地震數(shù)據(jù)，我們發(fā)現(xiàn)2023年2月發(fā)生在土耳其東南部的卡赫拉曼馬拉什地震（震中距約1000公里）導(dǎo)致了西里海地區(qū)富含流體的庫拉盆地內(nèi)56處泥火山發(fā)生形變和/或噴發(fā)，并在七條斷層上引發(fā)長達(dá)數(shù)十公里的厘米級靜默滑動。 這次等效矩震級達(dá)6.1的瞬態(tài)形變事件，與主要油氣田下方的局部隆升現(xiàn)象密切相關(guān)。我們推測地震波導(dǎo)致深層孔隙壓力變化，進(jìn)而觸發(fā)沿盆地及周邊多條地殼斷層的靜默滑動。 ▲ Abstract： Seismic waves from large earthquakes are known to trigger slip on distant faults, but the underlying mechanisms remain unclear. Using interferometric synthetic aperture radar and local geodetic and seismic data, we show that the 1000-kilometer-distant, February 2023 Kahramanmara? earthquakes in southeastern Türkiye triggered deformation and/or eruption at 56 mud volcanoes and centimeter-scale aseismic slip on seven faults over tens of kilometers within the fluid-rich Kura Basin in the West Caspian region. This transient deformation event, with an equivalent moment magnitude of 6.1, was coupled with local inflation below major hydrocarbon fields. We postulate that seismic waves led to a change in pore pressure at depth, which in turn triggered aseismic slip along several crustal faults crossing the basin and its surroundings. |
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