1-Dimensional Model of Seismic Velocity after Tarutung Earthquake 1 October 2022 Mw 5.8

Journal of Applied Geospatial Information

article

Resa Idha¹  Endah P. Sari¹  Yusran Asnawi³  Andrean V.H Simanjuntak²  Syahrul Humaidi¹  Umar Muksin⁴ 

[1] Post Graduate Program ,(Physics), FMIPA, Universitas Sumatera Utara;Agency of Meteorological Climatology and Geophysical for Indonesia;Department of Information Technology, Universitas Islam Ar-Raniry;Tsunami Disaster Mitigation Research Centre ,(TDMRC), Universitas Syiah Kuala

关键词: Earthquake;    Seismic;    PGA;    PGV;    Seismic Velocity;    Hypocenter;   

DOI  :  10.30871/jagi.v7i1.5662

学科分类：社会科学、人文和艺术（综合）

来源: Politeknik Negeri Batam

【 摘 要 】

On October 1, 2022, an earthquake with a magnitude (M) of 5.8 occurred in the Tarutung region, Indonesia and was associated with an active fault at a depth of 10 km. The earthquake fault with dextral mechanism is suitable with the pattern of active fault movement in Sumatra in the Northeast - Southwest direction. A total of 170 aftershocks occurred within a week span with magnitude variations of 1.7 – 4.0. In addition, the Tarutung earthquake was felt by the local peoples with an intensity of IV - VI MMI and caused 1 fatality, 25 injuries, and around 900 houses were damaged. Therefore, this study studies the characteristics of seismicity and damage caused by finding an appropriate 1-Dimensional seismic velocity model. The obtained 1-Dimensional speed model has varying values at a depth of 10 km with a speed of ~5.5 km/s and 30 km with a speed of ~7 km/s. The 1-D velocity model obtained has a convergent and unique solution with an RMS value 10% in Tarutung. This is consistent with the damage data and at the same time confirms that Tarutung is in a seismically active area.

【 授权许可】

CC BY-SA