The
Boda Report - Bodarapporten
The
Boda cave and it´s surroundings
The 9663 BP Paleoseismic event
Conclusions:
(1) the Boda Caves were formed by a very large earthquake in the varve
year 9663 BP
(2) primary thrust-faulting, violent secondary bedrock fracturing, ground
shaking
generating liquefaction, motions setting up a large tsunami and sea
floor turbidites
moving 210 km along the ice margin are recorded
(3) a sequence of shocks and aftershocks is recorded by multiple cycles
of liquefaction
(4) an area of, at least, 50x50 km was severely affected by this earthquake
(the bedrock
as well as the sediments)
(5) the region was stuck by six additional earthquakes in the time range
of 9800 to 3200
BP (the Storberget event being large, and the 6100 BP even being exceptionally
large)
(6) in order to understand and record paleoseismic events, it is necessary
to apply a
careful multidisciplinary research procedure
(7) our records seriously violate SKBs earthquake scenario
both with respect to long-term,
seismic hazard predictions and with respect to the area assumed to be
affected
by future earthquakes of the same type as those recorded in the past
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