gtcrustГеодинамика и тектонофизикаGeodynamics & Tectonophysics2078-502XInstitute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch10.5800/GT-2024-15-6-0798MPINZEgtcrust-1946Research ArticleСОВРЕМЕННАЯ ГЕОДИНАМИКАRECENT GEODYNAMICSСКОРОСТИ ГНСС-СТАНЦИЙ И ПОЛЕ ДЕФОРМАЦИЙ В СЕВЕРНОЙ ЧАСТИ о. СУМАТРА ЧЕРЕЗ 15 ЛЕТ ПОСЛЕ СУМАТРАНСКО-АНДАМАНСКОГО ЗЕМЛЕТРЯСЕНИЯ (М9.2), ПРОИЗОШЕДШЕГО В 2004 г.GNSS VELOCITY AND STRAIN FIELD IN THE NORTHERN SUMATRA 15 YEARS AFTER THE 2004 M9.2 SUMATRA ANDAMAN EARTHQUAKEАлифС. М.AlifS. M.

Тайнань 701, 35365, Южный Лампунг

 

Tainan 701, South Lampung 35365, Indonesia

АнггараО.AnggaraO.

35365, Южный Лампунг

South Lampung 35365

ДжихадМ. Ф.JihadM. F.

35365, Южный Лампунг

South Lampung 35365

ПерданаР. С.PerdanaR. S.

35365, Южный Лампунг

South Lampung 35365

Национальный университет Ченг Кунг; Суматранский технологический институтТайваньNational Cheng Kung University; Sumatra Institute of TechnologyTaiwan, Province of ChinaСуматранский технологический институтИндонезияSumatra Institute of TechnologyIndonesia202413122024156798798Copyright © Алиф С.М., Анггара О., Джихад М.Ф., Пердана Р.С., 20242024Алиф С.М., Анггара О., Джихад М.Ф., Пердана Р.С.Alif S.M., Anggara O., Jihad M.F., Perdana R.S.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.gt-crust.ru/jour/article/view/1946

Суматранско-Андаманское землетрясение с М9.2, произошедшее в 2004 г. в тектонически активной cеверной части о. Суматра, вплоть до недавнего времени могло быть причиной постсейсмических деформаций и должно быть принято во внимание при исследовании сейсмического потенциала. Базы данных скоростей ГНСС-станций до землетрясения и через 15 лет после него были использованы для получения предварительного показателя, касающегося того, имеет ли место постсейсмическая деформация в настоящее время. Новые значения скоростей были вычислены на основе временных рядов горизонтальных координат с использованием версии 5.2 программного обеспечения Bernese GNSS. Для этого было проведено сравнение скоростей и скоростей деформаций за два периода. На основе новых ГНСС-данных были получены скорости в диапазоне от 5.5 до 40.5 мм/год и скорости деформаций до 47.2 мкм/год. Характер деформаций этих двух периодов отчетливо выражен там, где векторные скорости направлены в сторону желоба, а проявление деформации растяжения особенно заметно в северной части. Это указывает на то, что постсейсмическая деформация все еще присутствует в этом районе даже спустя 15 лет после землетрясения.

The 2004 M9

The 2004 M9.2 Sumatra-Andaman earthquake in the tectonically active northern Sumatra, could generate postseismic deformation up to a recent period and needs to be considered for earthquake potential study. The GNSS velocities before and 15 years after the earthquake were used to obtain preliminary indicator of whether the postseismic deformation still takes place. Recent velocities were calculated from the horizontal coordinate time series that is obtained using Bernese GNSS software version 5.2. To do this, a comparison was made of velocities and strain rates over two periods. The velocities of 5.5 to 40.5 mm/yr and the strain rate up to 47.2 μstrain/yr were obtained from the recently acquired GNSS data. The pattern for the two-period values can be defined where the direction of vector velocities is trenchward, and extensional behavior occurs more often in the northern area. This indicates that postseismic deformation still occurs therein even 15 years after the earthquake.

 

 

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The authors declare that there are no conflicts of interest present.