Plattform Platform	Reise-Nr. Cruise-No.	Zeitraum Period	Projekt Project	Arbeitsgebiet Working area
Sonne1	SO212	22.12.2010 - 26.12.2010	SFB 754	South Pacific Ocean

Fahrtleiter Chief Scientist	Institut Institute	Auslaufhafen Port of departure	Einlaufhafen Port of return	Stationskarte Station map	Schiffsroute Trackchart
Fluh Ernst R.	Leibniz-Institut fur Meereswissenschaften an der Universitat Kiel	Talcahuano	Valparaiso

Ziel der Reise / Objectives of Cruise:

On February 27, 2010 the second largest earthquake of the 21th century happened in Central Chile. With a magnitude of Mw=8.8 it is among the 5 strongest earthquakes that were instrumentally recorded, and it occurred 50 years after the great 1960 Chile earthquake. It ruptured an area of approx. 800 km length and affected the Chilean provinces Bio-Bio and Maule and thus ruptured the segment to the north of the 1960 rupture zone. In this area, the IFM-GEOMAR and SFB574 had operated an amphibious network of seismological stations for 6 month in 2008, just prior to the earthquake. It was therefore of great interest to observe the aftershocks in this area, so that for the first time a detailed image before and after a megathrust earthquake will be available.Therefore, during leg SO209-2, from 18.–21 September 2010 thirty Ocean Bottom Seismometers (OBS) were deployed in the main rupture area between 33? and 36? S.During leg SO212 from 22.–26 December 2010, these instruments were recovered, starting from Talcahuano and ending the cruise in Valparaiso. It was possible to quickly check the data quality, and all but one instrument recorded well. Initial results from onboard data analyses exhibit a good data quality and profound results to be expected.

Messungen / Measurements