Figure 1
From: Slow deformation event between large intraslab earthquakes at the Tonga Trench

Seismicity map around the Tonga subduction zone, where the Pacific Plate subducts from the Tonga Trench. The coloured points show earthquakes during 2002–2017, the magnitudes of which are ≥ 4.5 as per the Advanced National Seismic System (ANSS) Comprehensive Earthquake Catalog (ComCat). Colour indicates focal depth. The beach-ball symbols and the red labels indicate the global Centroid Moment Tensor (CMT) solutions for large earthquakes, with magnitudes ≥ 7.4. The brown squares and labels indicate the Global Navigation Satellite System (GNSS) stations and their names. Figure generated with Generic Mapping Tools 5.x (https://www.generic-mapping-tools.org/).