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The Jiji major earthquake was a magnitude 7.3(ML) event. Local magnitude used Richter's scale always. There are different calculated method by magnitude MS (surface wave magnitude) and Mw (Moment magnitude). This event magnitude was 7.6 by Mw scale. The intensity scale is separated to 0~6 seven degrees in Taiwan area. 0 degree : peak ground motion below 0.8 gal(cm/sec/sec) 1 degree : PGA 0.8~2.5 gal 2 degree : PGA 2.5~8.0 gal 3 degree : PGA 8.0~25. gal 4 degree : PGA 25.~80. gal 5 degree : PGA 80.~250.gal 6 degree : PGA more than 250. gal Jiji earthquake has record PGA 980.gal near epicenter( about 10KM ).