APLIKASI TEKNIK ARRAY UNTUK MENENTUKAN ARAH RUPTURE GEMPA TOHOKU, JEPANG 11 MARET 2011; ARRAY TECHNIQUE APPLICATION TO DETERMINE DIRECTION OF RUPTURE TRACE FOR TOHOKU’S EARTHQUAKE, MARCH 11th 2011

Deassy Siska, Wiwit Suryanto

2013 | Disertasi | Program Studi S2 Fisika

We conduct a study using array technique to determine the rupture direction of Tohoku earthquake, Japan on March 11, 2011 at 05:46 UTC with Mw 9.0 (epicenter at 38,297oN ; 142,372oE). The research data was recorded at five stations using three components seismometer short-period type, in West Sumatera. This research began with Array Transfer Function (ARF) configuration Yellowknife and ARCESS type of array and then for array at West Sumatera. We use the Warangps from Geopsy software. Further more we used beam forming methode for analize the Fk-movie with MATLAB 7.10 (R2010a) to track the rupture direction of Tohoku’s Earthquake. Based of our analysis the back azimuth of rupture is changing from 40.180 to 46.50 with slowness of 4 – 4.4 s/deg.

Kata Kunci : rupture; array seismic; array response function; azimuth; slowness and beam forming.