Welcome on my office web page.

I am a senior researcher in seismology.

I am working at the Seismology and Tectonophysics Department of the

"Istituto Nazionale di Geofisica e Vulcanologia"

in Roma, Italy.

NEWS

2019-06-19

2019-06-18 13:22:19 (UTC) WSW of Tsuruoka, Japan

The epicenter location is the yellow star (K-net data). This map shows the transverse deformation at 20s on the K-net and Kik-net networks (http://www.kyoshin.bosai.go.jp). A clear focal pattern is present compatible with the USGS solution.

The high increase of the deformation observed at south is due to the presence of the Kanto basin, a deep structure which resonated even at very low frequencies. The general trend shows however a slight increase of the values in the southern part of the map. It may be interpreted as a small directivity effect of the rupture (uneven distribution of the slip or/and a nucleation point off the center.

2018-09-07

2018-09-05 18:07:58 UTC, Tomakomai, Japan

The epicenter location is the yellow star (K-net data). This map shows the transverse deformation at 20s on the K-net and Kik-net networks (http://www.kyoshin.bosai.go.jp). A clear focal pattern is absent. The node along strike is mainly at sea according to the focal mechanism computed by the USGS (https://earthquake.usgs.gov/earthquakes/eventpage/us2000h8ty) . The orthogonal node in the NE direction is weak. A increase of the deformation is observed at small distance. The main feature is a noticeable lower level at the south respect to the level at the north of the epicenter which may be interpreted as a directivity effect of the rupture. The high values around the epicenter may be due to an inadequate geometrical spreading correction. Actually, the maximum deformation is carried at small distances by the body waves meanwhile the whole map is corrected for a geometrical spreading factor for surface waves.