Improving depth estimations of African earthquakes using teleseismic data, and influence for the East-African rift seismic hazard characterization

SUMMARY Well-constrained earthquake depth estimations are important for seismic hazard determination. As local networks of the East-African Rift usually too sparse reliable estimations, we used detections pP and sP phase arrivals (the so-called phases) at teleseismic distance to constrain depths in this region. We rely on a fully automatic Cepstral analysis approach, first validated global scale using ISC-EHB catalogue, then applied seismicity. investigated 9575 earthquakes from magnitude 2 since 2005 which allows us estimation 584 events with mainly above 3.5, complemented by 139 previous studies based data as well. To ensure final catalogue complete possible, also identified regional catalogues 113 assumed be well constrained, network geometry empirical criteria. Thanks study, finally propose new distributions source zonation defined Poggi et al., order estimate East African Including those models leads significant changes assessments results.