Fig. 2From: Ground strains induced by the 2022 Hunga-Tonga volcanic eruption, observed by a 1500-m laser strainmeter at Kamioka, JapanDiagram of GIF adopted from the literature (Araya et al. 2017) with minor modifications. A frequency-stabilized laser beam is introduced to an input mode matching telescope to locate the beam waist at the position of the end reflector, and a quarter wave plate is inserted in the reference arm to enable the quadrature phase detectionBack to article page