Skip to main content
Earth, Planets and Space
Fig. 1 | Earth, Planets and Space

Fig. 1

From: Ground strains induced by the 2022 Hunga-Tonga volcanic eruption, observed by a 1500-m laser strainmeter at Kamioka, Japan

Fig. 1

Right and center: locations of the 1500-m laser strainmeter (GIF) at the KAGRA site and the Hunga-Tonga undersea volcano, respectively. The red curve represents the Great circle path between the KAGRA site and the volcano, along which the Lamb wave emitted by the eruption is supposed to have traveled to Japan, thereby forming a plane-wave-like pressure distribution. Left: topographical map around the KAGRA site in Kamioka. The GIF (red circles) is installed in one of the KAGRA tunnels (blue). The Great circle path is shown by the red line running SE to NW. A fraction of the strain induced by the traveling wave was observed as the GIF is rotated by approximately 105° from the propagation path

Back to article page