5:15 PM - 6:45 PM
[U15-P80] Distribution of uplifted amount along the coastline associated with the 2024 Noto earthquake
Keywords:GNSS, 2024 Noto earthquake, coastal topography, active submarine fault
The Mj 7.6 earthquake with a depth of 16km occurred at 16:10 JST on January 1, 2024, in the Noto Peninsula, Ishikawa Prefecture, central Japan (JMA, 2024). It was the second-largest inland earthquake in Japan for an observation period of about 120 years, and it caused severe shaking and damage in the northern part of the peninsula. An NE trending ~150-km-long aftershock epicentral zone extended from the north peninsula to the northeastern extension (JMA, 2024). The tsunami associated with this earthquake mainly hit the peninsula's east coast (GSI, 2024), suggesting seafloor deformation in the northeast extension of the aftershock zone.
In contrast, along the northern margin of the peninsula, the tsunami did not reach or have little affect due to coastal seafloor uplifting (GSI, 2024). The satellite image analysis revealed that raised seafloor continuously emerged along the north coast (GSI, 2024). Active submarine fault earthquakes distributed in the Japan Sea coastal area have often induced the uplift of coastal seafloors in some regions in the historical period. These drastic shifts of coastlines were recorded on historical documents and handwriting maps, and have been revealed from geomorphological studies in the Nishitsugaru in 1793, Kisakata in 1804, and Hamada in 1872.
We used a GNSS receiver to measure at over 400 points the upper limit of Corallina pilulifera, which is widely habited along the peninsula. We present preliminary results for the distribution of the uplifted amounts along the coastline associated with the 2024 Noto earthquake.
In contrast, along the northern margin of the peninsula, the tsunami did not reach or have little affect due to coastal seafloor uplifting (GSI, 2024). The satellite image analysis revealed that raised seafloor continuously emerged along the north coast (GSI, 2024). Active submarine fault earthquakes distributed in the Japan Sea coastal area have often induced the uplift of coastal seafloors in some regions in the historical period. These drastic shifts of coastlines were recorded on historical documents and handwriting maps, and have been revealed from geomorphological studies in the Nishitsugaru in 1793, Kisakata in 1804, and Hamada in 1872.
We used a GNSS receiver to measure at over 400 points the upper limit of Corallina pilulifera, which is widely habited along the peninsula. We present preliminary results for the distribution of the uplifted amounts along the coastline associated with the 2024 Noto earthquake.