Skip to main content
Earth, Planets and Space
Fig. 4 | Earth, Planets and Space

Fig. 4

From: The 2018 phreatic eruption at Mt. Motoshirane of Kusatsu–Shirane volcano, Japan: eruption and intrusion of hydrothermal fluid observed by a borehole tiltmeter network

Fig. 4

Tilt vectors in the study area. Yellow rectangles show the localities of vents formed during the 2018 eruption. White, red, and gray circles represent hypocenters for the periods from 1 January 2016 to 22 January 2018 (before the eruption), from 23 January to 22 April 2018 (after the eruption), and from 22 to 23 April 2018 (representative of SPCG unrest in 2018), respectively, as determined by the Kusatsu–Shirane Volcano Observatory, Volcano Fluid Research Center, Tokyo Institute of Technology. a Phase 1 (black arrows, Fig. 3) and phase 2 (white arrows, Fig. 3). b First half of phase 1 (black arrows; 10:00–10:01 JST). Note that the vector scale is different from that in Fig. 4a

Back to article page