Its June 27, 2022. Today we have a new instructor, he is Mr. Bigar Cristantyo. He discussed about the Historical Monitoring Instrument. Like, what instrument is used to detect tsunami, what instrument is used to record an earthquake, where does the first seismoscope invented, when the electromagnetic seismometer where developed, what instrument is used to detect tsunami and where can we see the evidence of past tsunami. Just like that, and also Sir Bigar show us the first invented seismometer of china. After the discussion Sir Bigar given a short quiz about the lesson for today and also he…