DOI: 10.1785/bssa0580020639. Minimum recording times for determining short-term seismicity from microearthquake activity

Minimum recording times for determining short-term seismicity from microearthquake activity

10.1785/bssa0580020639

Crossref journal-article

Seismological Society of America (SSA)

Bulletin of the Seismological Society of America (790)

Abstract

Abstract The minimum microearthquake recording time needed to determine short-term seismicity (10 years) has been established for regions having the same degree of activity as Socorro (400 shocks with M ≧ 0 each year). An analysis of more than five years of microearthquake data indicates that about six months of recording are required for a reliable estimate of the earthquake-frequency relation from which seismicity is calculated. If the slope b of the earthquake-frequency law is assumed, the short-term seismicity can be determined from four weeks of recording. The danger in the latter method is that a small error in b leads to relatively large errors in seismicity. Long-term seismicity (100 years) predicted from the present level of micro-earthquake activity in Socorro is much lower than the known seismicity of the region. The number of microearthquakes would have to increase by a factor of 20, or the value of b decrease approximately 20 per cent, before prediction would agree with the long-term seismic activity of the region.

Bibliography

Sanford, A. R., & Singh, S. (1968). Minimum recording times for determining short-term seismicity from microearthquake activity. Bulletin of the Seismological Society of America, 58(2), 639â644.

Authors 2

Allan R. Sanford (first)
Surendra Singh (additional)

References 4 Referenced 10

10.1785/BSSA0460020105 / Bull. Seism. Soc. Am. / Earthquake magnitude, intensity, energy and acceleration by Gutenberg ((1956))
10.1785/BSSA05406A1941 / Bull. Seism. Soc. Am. / Seismic waves with frequencies from 1 to 100 cycles per second recorded in a deep mine in northern New Jersey by Isacks ((1964))
{'key': '2021071416563789800_BIB3', 'first-page': '359', 'article-title': 'Elementary Seismology', 'author': 'Richter', 'year': '(1958)'} / Elementary Seismology by Richter ((1958))
{'key': '2021071416563789800_BIB4', 'first-page': '146', 'article-title': 'Seismic activity near Socorro, New Mexico', 'author': 'Sanford', 'year': '(1963)'} / Seismic activity near Socorro, New Mexico by Sanford ((1963))

Dates

Type	When
Created	4 years, 1 month ago (July 14, 2021, 12:56 p.m.)
Deposited	4 years, 1 month ago (July 14, 2021, 12:56 p.m.)
Indexed	1 year, 7 months ago (Jan. 10, 2024, 7:38 a.m.)
Issued	57 years, 4 months ago (April 1, 1968)
Published	57 years, 4 months ago (April 1, 1968)
Published Online	57 years, 4 months ago (April 1, 1968)
Published Print	57 years, 4 months ago (April 1, 1968)

Funders 0

None

BibTeX

@article{Sanford_1968, title={Minimum recording times for determining short-term seismicity from microearthquake activity}, volume={58}, ISSN={0037-1106}, url={http://dx.doi.org/10.1785/bssa0580020639}, DOI={10.1785/bssa0580020639}, number={2}, journal={Bulletin of the Seismological Society of America}, publisher={Seismological Society of America (SSA)}, author={Sanford, Allan R. and Singh, Surendra}, year={1968}, month=apr, pages={639–644} }

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