Radon anomaly: a possible precursor of the 1978 Izu-Oshima-kinkai earthquake

Journal Article · Fri Feb 22 00:00:00 EST 1980 · Science; (United States)

DOI:https://doi.org/10.1126/science.207.4433.882· OSTI ID:5406325

Wakita, H ^[1]; Nakamura, Y; Notsu, K; Noguchi, M; Asada, T

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1. Univ. of Tokyo, Japan

Precursory changes in the radon concentration of groundwater were observed prior to the Iau-Oshima-kinkai earthquake (magnitude 7.0) 14 January 1978. The distance from the epicenter to a continuous radon-monitoring station at Nakaizu was about 25 kilometers. A sudden drop and a subsequent increase in the radon concentration recorded on 9 January 1978 were significant. The size of the spike-like change was about 15%. After the earthquake, a remarkable increase in the radon concentration occurred.

• OSTI ID: 5406325
• Journal Information: Science; (United States), Vol. 207
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
54 ENVIRONMENTAL SCIENCES
EARTHQUAKES
FORECASTING
RADIATION MONITORING
GROUND WATER
RADON
JAPAN
PRECURSOR
ASIA
ELEMENTS
HYDROGEN COMPOUNDS
MONITORING
NONMETALS
OXYGEN COMPOUNDS
RARE GASES
SEISMIC EVENTS
WATER
580201* - Geophysics- Seismology & Tectonics- (1980-1989)
520301 - Environment
Aquatic- Radioactive Materials Monitoring & Transport- Water- (1987)