A tectonomagnetic effect detected in Central Italy

摘要: Significant variations in the absolute value of geomagnetic field intensity related to tectonic events, as earthquakes and volcanic eruptions, have been observed several cases. To detect such a tectonomagnetic effect seismic activity, seismomagnetic network was installed by Istituto Nazionale di Geofisica (ING) Abruzzi region (CentraI Italy), July 1989. This area is being uplifting since Pliocene. A logistic compromise between geophysical requirements electrified railway system tracks distribution led installation five total magnetic data acquisition sites. From 1989 September 1992 were simultaneously recorded at all stations compared that L'Aquila Observatory, located same area. variation about 10 nT level measured two on eastern side network. We suggest detected anomaly could resuIt from aseismic-changes crustal stress during this time.