Selvakone, Sivanandini
(2021)
Earth Magnetic Field Data Analysis For Earthquake Study.
Project Report.
Universiti Sains Malaysia, Pusat Pengajian Kejuruteraan Aeroangkasa.
(Submitted)
Abstract
Both International Real-Time Magnetic Observatory Network
(INTERMAGNET) and Magnetic Data Acquisition System (MAGDAS) are groundbased
magnetometer networks that have been developed to study the space weather.
and monitor the geomagnetic variations. A MAGDAS-II type magnetometer was
installed at Penang recently for seismic monitoring. Since the MAGDAS station is
newly established, the sensitivity and reliability of the magnetometer had to be tested
by comparing its data with geomagnetic data obtained from another well-established
magnetometer system, INTERMAGNET. The INTERMAGNET station that was
chosen for this study is Dalat, Vietnam. The variations of the geomagnetic components
H, D, and Z obtained from both stations are analysed to verify the effectiveness of the
newly installed MAGDAS magnetometer for seismic monitoring. Magnetometers
used to observe the changes in Earth’s magnetic field for earthquake study. The change
in the Earth’s magnetic field is caused by the increase in stress field within the
lithospheric layers prior to an earthquake which can be recorded at geomagnetic
stations of a specific distance. Therefore, this research also focused on examining the
relationship between geomagnetic variations and earthquakes in Sumatra from 2015
to 2020. Hence, the behaviour of the geomagnetic components H, D, and Z before the
earthquake must be monitored to identify a possible association between them. Any
anomalous variation observed in the geomagnetic field can be used as a precursor for
earthquakes to prevent casualties and damages.
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