Fig. 4

Location maps of the detected tremors (left) and their associated space–time projections in: a Manawatu; b Cape Turnagain; c Marlborough; and d Puysegur, New Zealand. Small black dots and yellow stars indicate Mw > 4 and Mw > 6 earthquakes, respectively. Inverted blue triangles indicate the seismic stations used in the tremor detection. Small red circles indicate the detected tremors. Reversed green triangles in a, c indicate the GPS stations shown in Fig. 5. The A–A′ profiles indicate the spatial coverage of the space–time projections