Event CH2-E1 - Modeled Age 675-801 CE
At the
deltaic site of Bet Zeyda (aka Beteiha), just north of the
Sea of Galilee (aka Lake Kinneret),
three-dimensional paleoseismic investigations
were conducted by multiple researchers over a number
of years using numerous trenches. The studies
examined a series of ~E–W-oriented
paleo-channels intersected and
sinistrally displaced by the ~N–S-trending
active Jordan Gorge Fault, producing a detailed
chronology of fault activity over roughly the past
2,000 years, based on
radiocarbon dating of
detrital charcoal. Once outliers are
excluded, this material appears to have a
residence time of decades rather than
centuries (e.g. see
Marco et al., 2005:200). Results indicate that
seismic events were more frequent and produced
greater fault slip during the first millennium CE
than in the second, suggesting the region may be
approaching another period of heightened seismic
activity.
Event CH2-E1 was identified by
Wechsler et al. (2018), who inferred its existence
“from the difference in offsets between Channels 1 and 2, without
cross-fault evidence of an event horizon.”
Wechsler et al. (2018) also discussed the possibility
that CH3-E1 and CH2-E1 represent the same event.
Wechsler et al. (2018:Table 3) date this event to
675–801 CE based on a
Bayesian model of radiocarbon ages.
They estimated that Event CH2-E1 produced ~1.3 m of
left-lateral offset.
Wechsler et al. (2018:214) note that the lack of
exposure of Channel 2 across the fault means the measured
offset “may represent slip from two events of smaller
magnitude, similar to that which occurred with the
1759 earthquake.”