Special seminar on the recent earthquake sequence at the Sea of Galilee
A special seminar on the recent earthquake sequence at the Sea of Galilee was held at the GSI on July 12th
Yariv Hamiel talked about the mechanisms controlling the occurrence of earthquake sequences in the northern Sea of Galilee
Yariv presented a geodetic study conducted during the last ten years at the Geological Survey of Israel which suggests a possible reason for the occurrence of earthquake swarms at the Sea of Galilee (Kinneret) in 2013 and 2018. The results of this research were published in the Geophysical Research Letters scientific magazine (Hamiel et al., 2016; Creep along the northern Jordan Valley section of the Dead Sea Fault). This research showed that while the main section of Dead Sea Fault south to the Sea of Galilee is creeping in its shallow parts the main section north to the Sea of Galilee in locked. Therefore, shear stresses are accumulating near the intersection between these two sections, increasing the probability for shallow earthquake swarms in the Sea of Galilee.
Nadav Wezler presented preliminary results of the earthquake sequence
In the video linked below presents the earthquake spatial and temporal distribution from the occurrence of the first event in that swarm. Grey lines indicate the location of the mapped faults at the sub-surface.
Eyal Shalev talked about groundwater response to the earthquake sequence in the Sea of Galilee
Strong groundwater level fluctuations around Israel were induced by the earthquake cluster recorded at the Sea of Galilee last week. The fluctuations were measured also at the Arava, more than 200 km from the earthquakes epicenters. The water level at Gome 1 borehole (south of Kiryat Shmona) includes fluctuation of two meters during the earthquake and a sustained water level change of 50 cm (figure attached).
Tsafrir Levi and Rani Calvo talked about the Sea of Galilee earthquake sequence, July 2018: Hazus scenarios
Following the earthquake cluster recorded at the Sea of Galilee last week, several synthetic scenarios of strong earthquakes were run to predict damage and slope failure. In the figure below, a slope failure map. The map points to a high-sensitivity regions of slope failure at different areas around the Sea of Galilee.