11:30 AM - 11:45 AM
[MTT49-04] Comparison of seismic waveforms observed by co-located seismometer and barometer installed indoors 2nd report
Keywords:Barometer, Seismometer, Barometer's Internal Mechanical Response by Earthquake
We started observation with co-located seismometer and barometer in Isumi, Chiba-prefecture (I30JP in The IMS Infrasound Network of CTBTO). This time one of barometer's port is close. A magnitude 4.5 earthquake occurred off south of Chiba-prefecture at a depth 44km. The seismic intensity scale in Isumi was 2. The port open barometer recorded pressure change due to the earthquake. Whereas, the port close barometer did not record pressure change due to the earthquake. It seems that the gravitational pressure change and barometer's internal mechanical response is very little at the seismic intensity 2 earthquake.