Oil the possible relationship between the Matsushiro earthquake swarm and the inactivity of Asama-yama Volcano

• Main Author: P. HÉDERVÀRI
• Format: Article
• Language: English
• Published: Istituto Nazionale di Geofisica e Vulcanologia (INGV) 1975-05-01
• Series: Annals of Geophysics
• Online Access: http://www.annalsofgeophysics.eu/index.php/annals/article/view/4907
• ISSN: 1593-5213; 2037-416X

During the famous Matsushiro earthquake swarm more
 t h a n 700 000 (volcanic) earthquakes were observed. At (he same time
 remarkable contortion of the ground also took place together with other
 strange geophysical phenomena. In the course of these events, volcano
 Asama-yama (one of the most active volcanoes of the world) showed a perfect
 inactivity. This volcano is situated at a distance of about 30 km measured
 from Matsushiro, that is very near the site of the events. In the paper a
 causal relationship is suggested between the geophysical phenomena at .Matsushiro
 and the inactivity of Asama-yama. Two alternative possibilites are
 t r e a t e d briefly. The hypothetical character of these ideas is strongly emphasized
 by the author, however both possibilities appear to be physically real
 and can explain all the important geophysical events observed on the spot.