Recent eruptive history of Stromboli (Aeolian Islands, Italy) determined from high-accuracy archeomagnetic dating

Details Recent eruptive history of Stromboli (Aeolian Islands, Italy) determined from high-accuracy archeomagnetic dating Recent eruptive history of Stromboli (Aeolian Islands, Italy) determined from high-accuracy archeomagnetic dating

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3119603a&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 19, CiteID L19603

Physics

5

Geomagnetism And Paleomagnetism: Archeomagnetism, Geomagnetism And Paleomagnetism: Paleomagnetic Secular Variation, Geomagnetism And Paleomagnetism: Time Variations-Secular And Long Term, Geomagnetism And Paleomagnetism: Instruments And Techniques, Volcanology: Eruption Monitoring (7280)

Scientific paper

The ``large sample method'' of archeomagnetic dating was applied to Stromboli. 127 samples (10 sites) yielded paleofield directions with 95% confidence intervals less than 2°. Coupled with a reference curve for secular variation in western Europe, these allow accurate dating of volcanic events. A lava flow underlying San Bartolo village gave a minimum age of AD 100 (+/-100) a lava overflow predating the last sector collapse was dated from 1350 (+/-60), suggesting the recent occurrence of highly hazardous events. Lava spatters and a hot avalanche high on the northern flank were emplaced during the XXth century; lava spatters on the lower flanks could date the onset of the still-ongoing phase from AD 550 (+/-50). These results are different from those obtained in a recent study, probably because traditional paleomagnetic sampling cannot yield sufficient precision, considering the characteristics of the archeomagnetic secular variation curve.

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