Fig. 1: Surface observations in the Hengill area.
From: Steam caps in geothermal reservoirs can be monitored using seismic noise interferometry
a Near-up surface displacement rates in the Hengill area. The location of the Nesjavellir and Hellisheiði power plants is represented with their corresponding initials within white squares. The location of the employed seismic stations is depicted by inverted triangles whose colors indicate the annual \(\triangle v/v\) rate. The Hengill fissure swarm is delineated with a dashed gray line63 and places of interest are depicted with solid black dots. b Mass balance in the Hellisheiði geothermal field, bluish colors (negative values) indicate production areas and reddish colors (positive values) injection fields. The numbered seismic stations are used in the following figures. The topographic map texture is based on the Digital Elevation Model (DEM) of the area (http://data.europa.eu/88u/dataset/e6712430-a63c-4ae5-9158-c89d16da6361).
