TITLE:
Liquefaction Structures from a High-Magnitude Paleoseismic Event at about 12,400 C14-Years BP in Southern Sweden
AUTHORS:
Nils-Axel Mörner
KEYWORDS:
Paleoseismics, Liquefaction, Tsunami, Late Glacial, Kattegatt Sea, Sweden
JOURNAL NAME:
Open Journal of Earthquake Research,
Vol.6 No.4,
November
9,
2017
ABSTRACT:
The Swedish catalogue of paleoseismic events includes 64 separate events. The
seismic activity was especially high, in magnitude and frequency, in the Late
Glacial with peak rates of glacial isostatic uplift. At about 12,400 C14-years BP
(14,600 cal?yrs BP), there was a very strong event on the Swedish west coast.
The magnitude was estimated at M > 8. It was linked to intensive liquefaction
and a major tsunami event. In this paper we describe sedimentological structures
of liquefaction, ground shaking and tsunami wave actions from the
Hunnestad gravel pits, to the east of the city of Varberg on the Swedish West
Coast. The liquefaction structures documented offer impressive and educational
insight into the process of liquefaction at high-magnitude earthquakes.