15:30 〜 16:30
[S01-P-22] Depth of earthquakes in Greenland
Even though earthquake monitoring in Greenland has been carried out almost continuously for nearly 90 years, the depth of earthquakes occurring in Greenland are poorly known. For most of the monitoring period the seismic network in Greenland have included only four or less seismic stations, which is a very limiting factor in earthquake depth determination, especially taking the size of Greenland (more than 2 million km2) into account. Except for the few earthquakes that has been teleseismicly observed, depth determination based on the seismic network in Greenland, has been highly uncertain. However, with the initiation of the GLISN project (Greenland Ice Sheet Monitoring Network) (http://glisn.info/) in 2009, the number of seismic stations has increased, so that there today are 21 seismic stations in operation in Greenland all with realtime data connections. GLISN is mainly in operation for the observation of cryo-seismic phenomenas, but it provide a significant contribution to the recording of earthquakes. Here we will present our first results on the depth distribution of earthquakes in Greenland, our focus is mainly on the seven most active regions, identified along the coast areas, but depth of earthquakes occurring below the Greenland ice sheet are also presented.