Earth's continuous oscillations observed on seismically quiet days

被引：100

作者：

Tanimoto, T ^{[1
]}

Um, J

Nishida, K

Kobayashi, N

机构：

[1] Univ Calif Santa Barbara, Dept Geol Sci, Santa Barbara, CA 93106 USA

[2] Univ Calif Santa Barbara, Inst Crustal Studies, Santa Barbara, CA 93106 USA

[3] Tokyo Inst Technol, Dept Earth & Planetary Sci, Tokyo 152, Japan

来源：

GEOPHYSICAL RESEARCH LETTERS | 1998年 / 25卷 / 10期

关键词：

D O I：

10.1029/98GL01223

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Analysis of IDA gravimeter data between 1983 and 1994 and GEOSCOPE data between 1988 and 1094 show that fundamental modes of the Earth, for frequencies between 2 and 7 mHz, are excited even on seismically quiet days. Amplitudes of acceleration are slightly less than one ngal(10(-9) gal). Examination of a sequence of shorter time interval records suggests that the Earth is oscillating continuously. Currently, both atmospheric excitation and tectonic motions are possible cause(s) of these oscillations.

引用

页码：1553 / 1556

页数：4

共 9 条

[1] SEARCHING FOR SLOW AND SILENT EARTHQUAKES USING FREE OSCILLATIONS [J].

BEROZA, GC ;

JORDAN, TH .

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS, 1990, 95 (B3) :2485-2510

[2] PRELIMINARY REFERENCE EARTH MODEL [J].

DZIEWONSKI, AM ;

ANDERSON, DL .

PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 1981, 25 (04) :297-356

[3]

FUKAO Y, 1997, S NEW IM EARTHS INT

[4]

IHMLE PF, 1996, EOS, V77, P501

[5]

NAWA K, 1997, IN PRESS EARTH PLANE

[6]

Peterson J., 1993, 92322 US GEOL SURV

[7]

ROULAND D, 1992, B SEISMOL SOC AM, V82, P2448

[8] GLOBAL SEISMIC EVENT DETECTION USING A MATCHED-FILTER ON LONG-PERIOD SEISMOGRAMS [J].

SHEARER, PM .

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 1994, 99 (B7) :13713-13725

[9]

TANIMOTO T, 1997, S NEW IM EARTHS INT

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