Speaker
Description
Southeast Aceh is one of the most seismically region, because the existence of the subduction zone and Great Sumateran Fault. Some historical devastating earthquake with magnitude range 5 – 7 occurred in 1965, 1980, 1997, 2008 and 2010, and could make intencity 4 – 7 MMI. To know the seismic activity, we have been deploy 7 seismometers, 3 short periods and 4 broadbands, with adding some station from BMKG and CTBTO network for 6 months from August 2018 until March 2019, which every 2 month we download the data. After 4 months recording, to get the preliminary results, we downloaded, investigated and analysed the waveform and found 900 event after did automatic locate with using STA/LTA method. From the result, the hypocentre distribution more occurred and spreaded in the southern part than northern part. Because of that, we rotate 3 sensor closed to the southern part, to minimalize the azimuth coverage and get a tigh raypath. We also conduct the microtremor survey to know the surface condition which standing on the basin. We take 25 point and analyse the H/V to get the dominant parameter. From H/V results, the surface condition can be inhabited, and not too influenced by microwave.
