The solutions obtained favour those event hypotheses resulting in time residuals which are most consistent over a given source region.
![denmark seismology earthquake bulletin denmark seismology earthquake bulletin](https://i.pinimg.com/474x/c8/ec/53/c8ec533ae04d3c22c1c65c02295e9a29.jpg)
Whereas single event location algorithms minimize vectors of time residuals on an event-by-event basis, the Bayesloc program finds a joint probability distribution of origins, hypocentres, and corrections to traveltime predictions for large numbers of events. A Bayesian multiple event relocation has resulted in a significant reduction in the spread of hypocentreĮstimates for both large and small events. A catalogue of several hundred events in the region since 1998 has been generated using many new phase readings on stations on both sides of the spreading ridge in addition to teleseismic P phases. New deployments and upgrades to stations on Greenland, Svalbard, Jan Mayen, Hopen, and Bjørnøya have resulted in a sparse but stable regional seismic network which results in events down to magnitudes below 3 generating high-quality Pn and Sn signals on multiple stations. Over the past two decades there has been a significant improvement in the seismic network in the Arctic: a difficult region to instrument due to the harsh climate, a sparsity of accessible sites (particularly at significant distances from the sea), and the expense and difficult logistics of deploying and maintaining stations. This is particularly acute for the lower magnitude events which may only be constrained by a small number of Pn and Sn arrivals. Existing seismic bulletins have considerable spread and bias resulting from limited station coverage and deficiencies in the velocity models applied.
![denmark seismology earthquake bulletin denmark seismology earthquake bulletin](https://i.pinimg.com/originals/27/24/4e/27244e1b8f96ddf1cf038b6659e92106.jpg)
The oceanic boundary separating the Eurasian and North American plates between 70° and 84° north hosts large earthquakes which are well recorded teleseismically, and many more seismic events at far lower magnitudes that are well recorded only at regional distances.