Exact(8)
Intense swarm activity has occasionally occurred in the caldera (Hiraga, 1987; Mannen, 2003).
Strong ground motion and fumarolic activity has sometimes accompanied intense swarm activity (Mannen, 2003).
The monitor detected a second intense swarm after passing the comet when the spacecraft was approximately 2,350 miles from the nucleus.
Within the caldera, intense swarm activities have often been observed at depths of 0 km (sea level) to 8 km (e.g., Yukutake et al. 2010; Mannen 2003).
He had several clues: On 12 May, an intense swarm of microearthquakes, registering at magnitudes of about 1 to 2, began beneath the Koyna Dam Reservoir, approximately 200 kilometers south of Mumbai.
Intense swarm activity has occasionally occurred within the caldera of Hakone volcano, sometimes accompanied by a strong ground motion and the emergence of new fumarolic fields (Hiraga 1987; Mannen 2003).
Similar(52)
Intense earthquake swarm activity and geodetic signals corresponding to the 2015 eruption were also observed within the Hakone caldera.
We detected large differences between the two pore-fluid pressure fields in the region A, whose northern part has the most intense microseismic swarm activity for two decades (Figs. 1, 2, 3).
The swam migrated northwestward toward the direction of Kozushima and Niijima and then developed the most intense earthquake swarm ever observed in and around Japanese archipelago (Japan Meteorological Agency 2000; Uhira et al. 2005).
The most active sector has been recently the strike-slip Futagawa Fault (Research Group for Active Faults of Japan 1991) that generated the Kumamoto earthquake (Mw 7, on April 15 , 2016 and was followed by an intense seismic swarm.
The most recent major activity at the volcano was in 1929, when an intense earthquake swarm rocked Hualālai, most likely caused by magmatic action near the volcano's peak.
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