Analysis of potential earthquake energy in the sianok segment

Abstract

Earthquakes are natural disasters that often occur and can harm the people in West Sumatera-Indonesia. One that makes West Sumatra prone to earthquakes is due to the existence of the Sianok segment. In this segment, there was an earthquake on March 3, 2,007 with a magnitude of 6.4 MW. Therefore the writer wants to calculate the amount of potential energy in this segment and the stress local conditions that exist in this segment. The data used is secondary data sourced from the earthquake catalog of the National Earthquake Information Center U.S. Geology Survey (NEIC / USGS) with an observation period of 1992 - 2016. Earthquake data used in this paper is M > 3.5 and h ≤ 70 Km. The processing of potential energy data uses the least square statistical and the local stress analysis is seen based on the a-value and b-value processed using the maximum likelihood calculation. The results of statistical calculations performed on the Sianok segment, the potential energy size for the Sianok segment is as much as 5.3763×1020 ergs since the March 2007 earthquake and the amount of the a-value and b-value in the Sianok segment is 4.51 and 0.808 ± 0.1.