DOI: 10.1785/bssa0350010003. Amplitudes of surface waves and magnitudes of shallow earthquakes*

Amplitudes of surface waves and magnitudes of shallow earthquakes*

10.1785/bssa0350010003

Crossref journal-article

Seismological Society of America (SSA)

Bulletin of the Seismological Society of America (790)

Abstract

Summary. A study of amplitudes of surface waves having periods of about 20 seconds is employed to improve the calculation of magnitudes of distant shallow earthquakes. Table 3 gives station corrections; table 4, revised figures for the effect of epicentral distance. It is found that for epicentral distances between about 20° and 175° the average observed amplitudes correspond closely to those calculated with an absorption coefficient k = 0.0003 per km. For paths completely outside or inside the Pacific Basin, k = 0.0002± per km., while for paths tangent to its boundary the amplitudes of surface waves with periods of about 20 seconds may be reduced by two-thirds or more (in extreme cases by almost nine-tenths) through reflection or refraction of energy; such seismograms of shallow shocks may be taken as indicating intermediate depth of focus.

Bibliography

Gutenberg, B. (1945). Amplitudes of surface waves and magnitudes of shallow earthquakes*. Bulletin of the Seismological Society of America, 35(1), 3â12.

Authors 1

B. Gutenberg (first)

References 3 Referenced 273

{'key': '2021052016245476300_BIB1', 'volume-title': 'Handbuch der Geophysik', 'author': 'Gutenberg', 'year': '(1932)'} / Handbuch der Geophysik by Gutenberg ((1932))
{'key': '2021052016245476300_BIB2', 'first-page': '73', 'article-title': 'On Seismic Waves (third paper)', 'volume': '47', 'author': 'Gutenberg', 'year': '(1936)', 'journal-title': 'Gerlands Beitr. z. Geophysik'} / Gerlands Beitr. z. Geophysik / On Seismic Waves (third paper) by Gutenberg ((1936))
10.1785/BSSA0250010001 / Bull. Seism. Soc. Am. / An Instrumental Earthquake Magnitude Scale by Richter ((1935))

Dates

Type	When
Created	4 years, 3 months ago (May 20, 2021, 12:25 p.m.)
Deposited	4 years, 3 months ago (May 20, 2021, 12:25 p.m.)
Indexed	1 month, 3 weeks ago (July 4, 2025, 9:05 a.m.)
Issued	80 years, 7 months ago (Jan. 1, 1945)
Published	80 years, 7 months ago (Jan. 1, 1945)
Published Online	80 years, 7 months ago (Jan. 1, 1945)
Published Print	80 years, 7 months ago (Jan. 1, 1945)

Funders 0

None

BibTeX

@article{Gutenberg_1945, title={Amplitudes of surface waves and magnitudes of shallow earthquakes*}, volume={35}, ISSN={0037-1106}, url={http://dx.doi.org/10.1785/bssa0350010003}, DOI={10.1785/bssa0350010003}, number={1}, journal={Bulletin of the Seismological Society of America}, publisher={Seismological Society of America (SSA)}, author={Gutenberg, B.}, year={1945}, month=jan, pages={3–12} }

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