DOI: 10.1785/bssa0670030587. Magnitudes of great shallow earthquakes from 1904 to 1952

Magnitudes of great shallow earthquakes from 1904 to 1952

10.1785/bssa0670030587

Crossref journal-article

Seismological Society of America (SSA)

Bulletin of the Seismological Society of America (790)

Abstract

abstract The “revised magnitudes”, M, converted from Gutenberg's unified magnitude, m, and listed by Richter (1958) and Duda (1965) are systematically higher than the magnitudes listed by Gutenberg and Richter (1954) in Seismicity of the Earth. This difference is examined on the basis of Gutenberg and Richter's unpublished original worksheets for Seismicity of the Earth. It is concluded that (1) the magnitudes of most shallow “class a” earthquakes in Seismicity of the Earth are essentially equivalent to the 20-sec surface-wave magnitude, Ms; (2) the revised magnitudes, M, of most great shallow (less than 40 km) earthquakes listed in Richter (1958) (also used in Duda, 1965) heavily emphasize body-wave magnitudes, mb, and are given by M=14Ms+34(1.59mb−3.97). For earthquakes at depths of 40 to 60 km, M is given by M = (1.59 mb − 3.97). M and Ms are thus distinct and should not be confused. Because of the saturation of the surface-wave magnitude scale at Ms ≃ 8.0, use of empirical moment versus magnitude relations for estimating the seismic moment results in large errors. Use of the fault area, S, is suggested for estimating the moment.

Bibliography

Geller, R. J., & Kanamori, H. (1977). Magnitudes of great shallow earthquakes from 1904 to 1952. Bulletin of the Seismological Society of America, 67(3), 587â598.

Authors 2

Robert J. Geller (first)
Hiroo Kanamori (additional)

References 32 Referenced 128

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{'key': '2021092217103375300_BIB10', 'first-page': '1501', 'article-title': 'Scaling relations for earthquake source parameters and magnitudes', 'volume': '66', 'author': 'Geller', 'year': '(1976)', 'journal-title': 'Bull. Seism. Soc. Am.'} / Bull. Seism. Soc. Am. / Scaling relations for earthquake source parameters and magnitudes by Geller ((1976))
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Dates

Type	When
Created	3 years, 11 months ago (Sept. 22, 2021, 1:17 p.m.)
Deposited	3 years, 11 months ago (Sept. 22, 2021, 1:17 p.m.)
Indexed	1 month, 1 week ago (July 16, 2025, 8:58 a.m.)
Issued	48 years, 2 months ago (June 1, 1977)
Published	48 years, 2 months ago (June 1, 1977)
Published Online	48 years, 2 months ago (June 1, 1977)
Published Print	48 years, 2 months ago (June 1, 1977)

Funders 0

None

BibTeX

@article{Geller_1977, title={Magnitudes of great shallow earthquakes from 1904 to 1952}, volume={67}, ISSN={0037-1106}, url={http://dx.doi.org/10.1785/bssa0670030587}, DOI={10.1785/bssa0670030587}, number={3}, journal={Bulletin of the Seismological Society of America}, publisher={Seismological Society of America (SSA)}, author={Geller, Robert J. and Kanamori, Hiroo}, year={1977}, month=jun, pages={587–598} }

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      "date-parts": [
        [
          1977,
          6,
          1
        ]
      ]
    },
    "published-print": {
      "date-parts": [
        [
          1977,
          6,
          1
        ]
      ]
    }
  },
  "URL": "http://dx.doi.org/10.1785/BSSA0670030587",
  "relation": {},
  "ISSN": [
    "1943-3573",
    "0037-1106"
  ],
  "subject": [],
  "published-other": {
    "date-parts": [
      [
        1977,
        6
      ]
    ]
  },
  "published": {
    "date-parts": [
      [
        1977,
        6,
        1
      ]
    ]
  }
}