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Start Over Author "Ritter, O" Topic 550 - earth sciences
78 results on '"Ritter, O"'

6. CO2 storage in eastern Brandenburg: Implications for geothermal heat provision and conception of a salinisation early warning system – Review of current progress of the joint-project brine

Author

Kempka, T., Endler, R., Eydam, D., Herd, R., Huenges, E., Jahnke, C., Jolie, E., Janetz, S., Krause, Y., Kühn, M., Magri, F., Moeck, I., Möller, M., Muñoz, G., Nakaten, B., Ritter, O., Schafrik, W., Schmidt-Hattenberger, C., Schöne, E., Tillner, E., Voigt, H., Wagner, F., and Zimmermann, G.

Subjects
550 - Earth sciences
Published
2012

12. Magnetotelluric Exploration of the Sipoholon Geothermal Field, Indonesia

Author

Niasari, S., Muñoz, G., Kholid, M., Suhanto, E., Ritter, O., and ICGR International Center for Geothermal Research, Geoengineering Centres, GFZ Publication Database, Deutsches GeoForschungsZentrum

Subjects
550 - Earth sciences
Abstract

The Sipoholon geothermal field is located in North Sumatra, Indonesia. The geothermal field is characterized by 15 hot springs situated in the Tarutung pull-apart basin and an additional 8 hot springs outside of the basin. The main difficulty in understanding the geothermal system is the temperature distributions of the hot springs, which appears to be random, based on the occurrence of 3 inactive volcanoes around the basin. Here we report on preliminary results of two MT experiments that were carried out in Sipoholon, in December 2010 and July 2011. Data quality is generally good with the exception of sites from the populated basin area, which is noisier. Preliminary modeling results indicate a shallow high conductivity layer in the pull-apart basin area is generally caused by the sedimentary fill. Deeper conductive structure occurs east of the basin. Further data processing and modeling is necessary to decide if zones of high conductivity are related with a clay cap or hydrothermal fluids.

Published
2011

24. The International Plate Boundary Observatory Chile (IPOC) in the northern Chile seismic gap

Author

Schurr, B., Asch, A., Sodoudi, F., Manzanares, A., Ritter, O., Klotz, J., Chong-Diaz, G., Barrientos, S., Villotte, J., and Oncken, O.

Subjects
550 - Earth sciences
Abstract

Fast convergence between the oceanic Nazca and the continental South American plate is accommodated by recurrent rupture of large segments of the two plates’ interface. The resulting earthquakes are among the largest and, for their sizes, most frequent on Earth. Along the Chilean and southern Peruvian margin, all segments have ruptured at least once in the past 150 years for which there exist historic and/or instrumental records. The one segment that is most mature for re-rupture stretches for more than 500 km along the northernmost Chilean coast between roughly -23° and -18° latitude. It last broke in 1877 in a magnitude ~8.8 earthquake, triggering a major Tsunami. From the historical record, it has been known to have a recurrence cycle of approximately 110 years. The adjoining segments to the north and south broke rather recently in 1995 and 2001 in M>8 earthquakes and an M 7.7 earthquake encroached the southern part of the gap in 2007. The IPOC project intends to investigate this segment of the Nazca-South American plate boundary, on which a strong to devastating earthquake is expected to occur within the next years, by monitoring at a variety of time-scales deformation, seismicity, and magnetotelluric fields in the subduction zone at the closing stages of the interseismic cycle before and possibly during occurrence of a big earthquake. For that purpose, installation of long-term observatories in Northern Chile started in 2006 in a close cooperation of the Universidad de Chile (Santiago, Chile), the Universidad Catolica del Norte (Antofagasta, Chile), the Institut de Physique du Globe de Paris (Paris, France), and the German Research Centre for Geosciences (GFZ, Potsdam, Germany). Currently we are operating 14 modern seismological stations equipped with STS-2 broadband seismometers and accelerometers (EPI sensor). At least two more stations will be installed in the near future. To cope with the high resolution and dynamic of the sensors and data acquisition, site installation was accomplished with special care. At each station a cavern was blasted into the bedrock up to 5 meters deep to ensure stable conditions for measurements. Currently five stations are additionally recording continuously GPS signals, another five are also recording meteorological data, and another seven are equipped with Magneto-Telluric (MT) probes (fluxgate magnetometers and electrode lines). It is planned to extend the multi-parameter observation to as many stations as possible. So far ten of the stations are sending continuous data via satellite links (VSAT) to the GEOFON data host at the GFZ. We will be reporting first results on seismicity, transient deformation and MT from the first two years of recording.

Published
2009

39. Plate interface properties at the southern central Chilean margin from onshore geophysical image across the seismogenic couplin zone

Author

Krawczyk, C., Haberland, C., Brasse, H., Götze, H., Ritter, O., Bataille, K., TIPTEQ RESEARCH GROUP, 2.4 Seismology, 2.0 Physics of the Earth, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, Environmental Geotechnique, Geoengineering Centres, GFZ Publication Database, Deutsches GeoForschungsZentrum, and 3.1 Lithosphere Dynamics, 3.0 Geodynamics and Geomaterials, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum

Subjects
550 - Earth sciences
Published
2006

46. Magnetotelluric monitoring experiment in TIPTEQ

Author

Ritter, O., Hübert, J., Asch, G., TIPTEQ RESEARCH GROUP, 3.1 Lithosphere Dynamics, 3.0 Geodynamics and Geomaterials, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, and Environmental Geotechnique, Geoengineering Centres, GFZ Publication Database, Deutsches GeoForschungsZentrum

Subjects
550 - Earth sciences
Published
2006

48. A magnetotelluric monitoring experiment in the subduction system of Chile

Author

Ritter, O., Hübert, J., TIPTEQ Research Group, 3.1 Lithosphere Dynamics, 3.0 Geodynamics and Geomaterials, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, 2.4 Seismology, 2.0 Physics of the Earth, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, and Environmental Geotechnique, Geoengineering Centres, GFZ Publication Database, Deutsches GeoForschungsZentrum

Subjects
550 - Earth sciences
Published
2006

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