Besides epicenter location and magnitudes the system automatically computes fault plane solutions and dynamic source parameters. The network has been collecting data since the beginning of 1990, and it has a nearly complete record down to magnitude 0 earthquakes inside the area. The SIL project started with the construction of a seismic network for near-real time data acquisition. Furthermore, the seismological data form the basis for research and consultancy within a wide range of seismological disciplines, nationally and internationally.
GEUS’ data form part of the international monitoring of earthquakes and nuclear-bomb tests and they contribute to more precise localisation. Earthquake swarms, slowquakes, and strain episodes are commonly observed in the zone and in its proximity. Data from the seismograph stations in Denmark and Greenland are used for registering both local and distant earthquakes. The seismogenetic crust is 10 to 45 km thick and is underlain by partially molten mantle material. Thus, apparently the general left-lateral transform motion is accommodated by counterclockwise rotation of the fault blocks. These events are associated with right-lateral faulting on N-S striking faults arranged side-by-side along the E-W trending zone.
Earthquakes in this area reach the magnitude of roughly 7 and tend to culminate in sequences with duration from a few days to a few years. The zone has many characteristics of a transform zone and takes up east-west relative motion between two offset branches of the mid-Atlantic rift zone i.e., the eastern volcanic zone of Iceland and the Reykjanes Ridge. The August 14, Mw7.2, Nippes earthquake in Haiti occurred within the same fault zone as its devastating, Mw7.0, 2010 predecessor but struck the country when field access was limited by. The South Iceland Lowland (SIL) project, started in 1988, is a concerted effort of the Nordic countries toward earthquake prediction research in the South Iceland seismic zone (SISZ), where most destructive earthquakes in the history of iceland have occurred.
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