Fig. 1: The last Jerk signal.
From: Jerk, a promising tool for early warning of volcanic eruptions
Example of the jerk signal from the two horizontal components recorded at the RER station before the last eruption at Piton de la Fournaise (July 2, 2023): time series and particle motion. The black arrow indicates the alarm time and the color scale refers to the particle motion time on the map. Contours of the associated lava flows are also shown.
