MSK INTENSITY SCALE AS COMPARED WITH JMA INTENSITY SCALE

WHILE THE UNESCO MEETING ON SEISMOLOGY AND EARTHQUAKE ENGINEERING IN 1964 RECOMMENDED THAT THE 12-POINT MSK SCALE BE TEMPORARILY ADOPTED AS AN INTERNATIONAL STANDARD, THE 8-POINT JMA (JAPAN METEOROLOGICAL SOCIETY) SCALE HAS BEEN IN USE IN JAPAN FOR 70 YEARS. ACCORDINGLY, IN 1967 AN ARRANGEMENT WAS MADE WITH 110 JMA WEATHER STATIONS TO FILL OUT, FOR ALL SHOCKS, A QUESTIONNAIRE FROM WHICH THE AUTHORS DETERMINED THE MSK INTENSITY. FIRST, HOWEVER, THEY COMPARED THE MSK SCALE WITH THE MM (MODIFIED MERCALLI) SCALE AND FOUND THEM QUITE SIMILAR. THEN A WORKING RELATIONSHIP BETWEEN THE MSK AND JMA SCALES WAS HYPOTHESIZED FROM EMPIRICAL FORMULAS. FINALLY, DATA FROM KNOWN EARTHQUAKES AND FROM THE QUESTIONNAIRES WERE EMPLOYED TO IDENTIFY VARIABLES THAT CAUSED THE RELATIONSHIP TO BREAK DOWN, FROM WHICH APPROPRIATE MODIFICATIONS WERE MADE. IT WAS THEN DETERMINED THAT THE TWO SCALES HAVE THEIR OWN AREAS OF GREATER AND LESSER SENSITIVITY, WHICH SUGGESTS THAT THE TWO COMPLEMENT EACH OTHER AND THAT NEITHER IS AN ADEQUATE REPLACEMENT FOR THE OTHER.

  • Corporate Authors:

    Public Works Res Inst, Cm /Japan

    ,    
  • Authors:
    • HIRONO, T
    • Sato, K
  • Publication Date: 1972

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Filing Info

  • Accession Number: 00236505
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 19 1973 12:00AM