5:15 PM - 6:45 PM
[U15-P62] Crustal deformation of the 2024 Noto Peninsula Earthquake observed at GEONET Stations
We observed the crustal deformation associated with the 2024 Noto Peninsula Earthquake using F5 data (Takamatsu et al., 2023) of GEONET(GNSS Earth Observation Network System) stations. I will give an overview of this.
Seismic activity increased in the Noto Peninsula in December 2020, and crustal movements different from normal ones were observed at GEONET stations in the northern part of the peninsula (Suzu, Wajima 2, Noto, Wajima).In July 2022, in order to strengthen crustal deformation observation, Removable GNSS Monitoring System (REGMOS) will be installed at two stations in Suzu city (M Suzu Noroshi, M Suzu Sasanami), and will be combined with GEONET stations. We conduct analysis and monitor crustal deformation.
When an M 6.5 earthquake occurred off the coast of the Noto Peninsula on May 5, 2023, horizontal fluctuations of approximately 9 cm occurred at the M Suzu Sasanami station, which is a REGMOS station. And vertical fluctuations of approximately 13 cm occurred at the M Suzu Noroshi station. In addition to the observation of crustal deformation, postseismic deformation was also observed at multiple GEONET stations in the northern part of the Noto Peninsula.
On January 1, 2024, an M7.6 earthquake occurred in the Noto region of Ishikawa Prefecture. As a result of this earthquake, extremely large crustal deformations were observed mainly in the Noto Peninsula, including a horizontal movement of about 2.0 m toward the southwest and an uplift of about 1.3 m at Wajima 2 station. In addition, crustal deformation was observed not only on the Sea of Japan side of Niigata and Toyama prefectures, but also in a wide area spanning the Tohoku, Kanto, and Chubu regions. Even after the M7.6 earthquake, fluctuations considered to be postseismic deformation have been observed over a wide area.
For each of the above events, we will provide an overview of the changes in crustal deformation by presenting the fluctuation vector diagrams of each stations, time-series graphs of baseline changes, and statistical processing such as trend removal.
Seismic activity increased in the Noto Peninsula in December 2020, and crustal movements different from normal ones were observed at GEONET stations in the northern part of the peninsula (Suzu, Wajima 2, Noto, Wajima).In July 2022, in order to strengthen crustal deformation observation, Removable GNSS Monitoring System (REGMOS) will be installed at two stations in Suzu city (M Suzu Noroshi, M Suzu Sasanami), and will be combined with GEONET stations. We conduct analysis and monitor crustal deformation.
When an M 6.5 earthquake occurred off the coast of the Noto Peninsula on May 5, 2023, horizontal fluctuations of approximately 9 cm occurred at the M Suzu Sasanami station, which is a REGMOS station. And vertical fluctuations of approximately 13 cm occurred at the M Suzu Noroshi station. In addition to the observation of crustal deformation, postseismic deformation was also observed at multiple GEONET stations in the northern part of the Noto Peninsula.
On January 1, 2024, an M7.6 earthquake occurred in the Noto region of Ishikawa Prefecture. As a result of this earthquake, extremely large crustal deformations were observed mainly in the Noto Peninsula, including a horizontal movement of about 2.0 m toward the southwest and an uplift of about 1.3 m at Wajima 2 station. In addition, crustal deformation was observed not only on the Sea of Japan side of Niigata and Toyama prefectures, but also in a wide area spanning the Tohoku, Kanto, and Chubu regions. Even after the M7.6 earthquake, fluctuations considered to be postseismic deformation have been observed over a wide area.
For each of the above events, we will provide an overview of the changes in crustal deformation by presenting the fluctuation vector diagrams of each stations, time-series graphs of baseline changes, and statistical processing such as trend removal.