Figure 1
From: Picking up the hydrothermal whisper at Ischia Island in the Covid-19 lockdown quiet
Map of Ischia Island with the stations reported as triangles (Map data 2018 Google retrieved from https://www.google.it/maps/@40.7251646,13.9032732,8719m/data=!3m1!1e3). Permanent stations22 are indicated in yellow and temporary ones23 in light blue. The red line surrounds the forbidden area (red zone) most struck by the MD 4 earthquake of August 21, 2017.
