[S01-P] Poster

[S01-P-07] Adding manual picks from OBS stations into the ISC Bulletin: the example of the 7D Cascadia Initiative Community Experiment

^○Domenico Di Giacomo¹, Luke Cottell², Elizabeth Entwistle¹, James Harris¹, Dmitry Storchak¹ (1.International Seismological Centre, Thatcham, UK, 2.Imperial College, London, UK)

The International Seismological Centre (ISC) integrates instrumental seismological parametric data (e.g., hypocenters, phase arrival times, amplitudes/periods, moment tensor solutions etc.) from ~130 agencies around the world to produce the most comprehensive bulletin of the Earth's seismicity, the ISC Bulletin. Whilst the main contributors to the ISC are monitoring agencies operating at various scales, the ISC Bulletin can benefit from additional parametric data coming from temporary deployments. In this contribution we show how manual picks from the OBS data of the Cascadia Initiative Community Experiment (http://www.fdsn.org/networks/detail/7D_2011/, IRIS OBSIP, 2011) were integrated into the ISC Bulletin and used for the ISC hypocentre relocation. In total approximately 6400 picks of primary and secondary arrivals have been picked for large teleseismic earthquakes and moderate-to-large earthquakes in the local/regional distance range. Despite the high noise level of OBS waveforms over 50% of the picks contribute to ISC relocations. We encourage researchers processing data from temporary deployments to send parametric data to the ISC in order to improve the configutation network of the ISC locations; this in turn will improve specialised ISC datasets (e.g., ISC-EHB, GT and ISC-GEM) and offer an even denser dataset to ISC users (e.g., for tomographic studies).

References:
IRIS OBSIP (2011): Cascadia Initiative Community Experiment - OBS Component. International Federation of Digital Seismograph Networks. Other/Seismic Network. doi:10.7914/SN/7D_2011