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| Titel |
Review of some significant claimed irregularities in Scandinavian postglacial uplift on timescales of tens to thousands of years – earthquakes in Denmark? |
| VerfasserIn |
S. Gregersen, P. H. Voss |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1869-9510
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| Digitales Dokument |
URL |
| Erschienen |
In: Solid Earth ; 5, no. 1 ; Nr. 5, no. 1 (2014-02-20), S.109-118 |
| Datensatznummer |
250115256
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| Publikation (Nr.) |
 copernicus.org/se-5-109-2014.pdf |
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| Zusammenfassung |
| The postglacial uplift and surrounding subsidence in Scandinavia is well described as close
to regular, and the phenomenon is similar on timescales of tens, hundreds
and thousands of years studied via geodesy, seismology and geology. Searches
for irregularities in the form of earthquakes claimed in the scientific
literature have disclosed many earthquakes right after the Ice Age, 9000 yr
ago, and some later cases for further evaluation. In a previous report, the
present authors have mentioned doubts about the validity of some of the most
significant claimed irregularities. In the present paper, a review is made of
these significant claimed irregularities in the south-western flank of the
Scandinavian postglacial uplift and subsidence via literature studies of geodetic
and geological claims of earthquakes as well as discussions in the field.
Geodetic observations exist for all of Scandinavia that describe the
phenomenon on a scale of 10s–100s of years. Earthquake observations in seismology
are of relevance in the same timescales. Geological studies of dated shore
lines describe the postglacial vertical earth-surface motion in a quite
different timescale of 100s–1000s of years. There is a need for integration
of these observations geographically. This is happening in the various timescales in the DynaQlim project. The review finds the claims unlikely to be
earthquakes concerning the following: (1) geodynamical motion in the Copenhagen
area, (2) a palaeo-earthquake in Læsø and (3) the recently proposed
water level discrepancy in the southern part of Denmark. The assessment is
less certain, but falls to improbable when concerning (4) proposed
palaeo-earthquakes by Hallandsåsen in south-western Sweden. |
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