Deutsches Ozeanographisches
Datenzentrum Inventur der Poseidon-Reise POS484 (DOD-Ref-No.20150066)
Inventory of Poseidon Cruise POS484 (DOD-Ref-No.20150066)

Plattform
Platform
Reise-Nr.
Cruise-No.
Zeitraum
Period
Projekt
Project
Arbeitsgebiet
Working area
Poseidon POS484 24.04.2015 - 09.05.2015 MARSITE
 
Sea of Marmara  

Fahrtleiter
Chief Scientist
Institut
Institute
Auslaufhafen
Port of departure
Einlaufhafen
Port of return
Stationskarte
Station map
Schiffsroute
Trackchart
Kopp Heidrun GEOMAR Helmholtz-Zentrum fur Ozeanforschung Kiel Izmir Malaga   

Ziel der Reise / Objectives of Cruise:

The area around the Marmara Sea, one of the most densely populated parts of Europe, is subject to a high level of seismic hazard.The objective of the RV Poseidon 484, leg 1 cruise was to recover a small aperture array of 6 OBS stations installed to monitor micro-seismicity along the Marmara fault segment of the North Anatolian Fault Zone (NAFZ). After recovery the stations were reinstalled with a slightly larger aperture of 15 km. Second objective was to check the state of health of an array of 10 geodetic transponders including download of data logged since November 2014. The Marmara segment of the NAFZ is the only segment that has not been activated in the present series of major earthquakes and may have accumulated a slip deficit of up to 4-5 m since the last event in 1766. RV Poseidon left the harbour of Izmir on Thursday April 24, 2015 at 08:00 local time (equals 06:00 UTC time). Weather conditions during the whole cruise were good with little wind and cloudy to sunny sky. The ship arrived in the working area on 25.04.2015 at 12:00 local time and started to recover the 6 OBS stations. It took 3 hours to recover all 6 OBS stations due to the small aperture of the seismic array. All releasers opened and stations could be recovered without problems. The state of sea was very calm during the whole time in the working area. Starting at 15:15 the Sonardyne modem was lowered to 60 m water depth in order to read out the data of the 10 geodetic stations which were installed with RV Pourquoi Pas? between 27 October and 1st November 2014. The geodetic stations worked very well and most of the baselines had visibility and all sensors worked as expected. Over night Poseidon took a waiting position until the next day (Sunday 26 April 2015) and started at 07:06 (UTC time 05:06) with the deployment of the first OBS station (station name MAR2). At 14:20 local time all 6 stations were installed with new batteries at their new positions and Poseidon headed to the port of Canakkale where she arrived on the 27 April 2015 at 10:00 local time. Thereafter Poseidon headed towards the Tyrrhenian sea (Italy) for the second leg of POS484.

Messungen / Measurements

Institut
Institute
Wissenschaftler
Scientist
Anzahl
Number
Einheit
Unit
Typ der Messungen
Type of measurements
Kommentar
Comments
Daten im DOD
Data in DOD
GEOMAH Kopp Heidrun 1 survey G72
Geophysical measurements made at depth (below near surface and above seafloor)
seafloor geodesy data recovery. 25.04.2015 no

Verankerungen / Moorings

Institut
Institute
Wissenschaftler
Scientist
Typ der Messungen
Type of measurements
Kommentar
Comments
geogr.Breite
Latitude
geogr.Länge
Longitude
Daten im DOD
Data in DOD
GEOMAH Kopp Heidrun G72 Ocean bottom seismometer 28° 20.9' N 40° 50.8' E no
GEOMAH Kopp Heidrun G72 Ocean bottom seismometer 28° 28.8' N 40° 51.0' E no
GEOMAH Kopp Heidrun G72 Ocean bottom seismometer 28° 28.8' N 40° 52.8' E no
GEOMAH Kopp Heidrun G72 Ocean bottom seismometer 28° 33.6' N 40° 51.5' E no
GEOMAH Kopp Heidrun G72 Ocean bottom seismometer 28° 33.6' N 40° 53.3' E no
GEOMAH Kopp Heidrun G72 Ocean bottom seismometer 28° 41.4' N 40° 52.8' E no
16.11.2019