Tectonomagnetic field observations in central Italy 1989–1995

摘要: Abstract It has been reported that earthquakes and volcanic eruptions produce significant variations in the geomagnetic field. To investigate possible tectonomagnetic effects related to seismic activity, Istituto Nazionale di Geofisica installed a seismomagnetic network central Italy; area was selected after magnetic noise survey. Geomagnetic field intensity data are simultaneously recorded at four magnetometer stations L'Aquila Observatory, which is located same area. The differentiated order detect local anomalies. present study reports observations Italy from July 1989 March 1995 also discusses detectability of effect this A variation about 5 nT over two-month period (January–February 1990) observed No other anomaly observed, although moderate seismicity occurred during period.