scanloc

Local earthquake monitoring

Introduction

scanloc boosts the monitoring of natural and induced seismicity at local and regional epicentral distances. It is designed to monitor local and micro seismicity within small but also large seismic networks typicall. Typical networks consist of 5 to 20 stations and sometimes even many more were the station distances are in the range of hundreds of meters to tenth of kilometers.

Technology

scanloc makes use of a cluster search algorithm to associate phase detections to one or many potential earthquake sources. While the cluster search itself is based on P-phases only, in a second step S-phases are also associated and used for locating the earthquake.

In order to provide high-quality picks from S phases, a new S picker is distributed along with scanloc. The S picker allows to identify S phases on the horizontal components or on the vertical components if the horizontals should be unavailable. A userfriendly GUI allows to tune the S picker configuration.

Applications

scanloc has proven its performance for example by detecting between 200-300 earthquakes a day with magnitudes ranging from M1 to M4 with only very few false detections in the CX network (Chile) with station distances of about 50-70 kilometers. The module is also widely applied to record swarm earthquakes or micro earthquake in geothermal environments or in oil and gas production sites.

Brochure Documentation

Promotion

scanloc has been demonstrated, promoted and discussed with scientists and the SeisComP3 community at international science conferences, e.g.:

J. Clinton, F. Grigoli, T. Diehl, T. Kraft, L. Scarabello, M. Hermann, P. Kaestli, M. Boese, S. Wiemer: Advanced  Real-time Monitoring for Natural and Induced seismic sequences, 2018, Geophyscial Research Abracts, EGU General Assembly, Vol. 20, abstract: EGU2018-9480-2

F. Grigoli, M. Boese, L. Scarabello, T. Diehl, B. Weber, S. Wiemer, J. F. Clinton: Picking vs Waveform based detection and location methods for induced seismicity monitoring, 2017, Geophyscial Research Abracts, EGU General Assembly, Vol. 19, abstract: EGU2018-9480-2

D. Roessler, J. Becker, E. Ellguth, R. Henneberger, S. Herrnkind, B. Weber: Cluster-search based monitoring of local earthquakes in SeisComP3, 2016, AG Seismology - 42. meeting, Bad Salzschlirf, Germany

D. Roessler, E. Ellguth, S. Herrnkind, B. Weber, R. Henneberger, H. Blanck: Cluster-search based monitoring of local earthquakes in SeisComP3, 2016, AGU Fall Meeting, San Francisco, USA, abstract S31E-06