Event 2
Altunel et al. (1999) identified Event 2 in
Trench 2 where the main F2 fault and associated
antithetic (F2-1, F2-2) and
synthetic (F2-3) faults cut units a
and b but are overlain by unit c, indicating a
discrete
pre-1995 rupture. Vertical displacements
reach c. 215 cm in coarse gravels of unit a and 140 cm in
unit b. Variable displacements suggest
reactivation of Fault F2 from prior event(s) and
cumulative slip. Event 2 occurred after deposition of
unit b and before the accumulation of unit c, and is constrained by a
tuffite dated to ~3500 yr
BP, and a
charcoal age of 590 ± 50 yr BP derived from
overlying deposits. These constraints place Event 2 between ~1550 BCE and 1410 CE.
Altunel et al. (1999) constrained this further by noting that no earthquakes are reported in the historical record between 53 CE and 1875 CE.
Altunel et al. (1999) suggest that Event 2 may correlate with the
88 BCE earthquake, which affected
Apamea Kibotos. This event may represent the latest major activation of the F2 fault prior to a prolonged phase of
seismic quiescence, which,
according to
Altunel et al. (1999)'s interpretation, persisted from 53 CE until 1875 CE.
It is also possible that Event 2 correlates to an
earthquake in 53 CE.
Trenches 1 and 2 are both perpendicular to the
Dinar fault,
which is an
active
normal fault
trending NW–SE.
Altunel et al. (1999:297) suggested that Event 2 was caued by a M > 6.8 earthquake.
