Shear-wave splitting observations on Milos, Greece

Journal Article · Sun Jan 01 04:00:00 EST 1989 · Geothermics; (USA)

DOI:https://doi.org/10.1016/0375-6505(89)90059-X· OSTI ID:5276865

Booth, D C; Crampin, S ^[1]; Schleper, S; Ochmann, N; Wohlenberg, J ^[2]

---

1. British Geological Survey, Edinburgh (UK)
2. Lehrgebiet fur Angewandte Geophysik, RWTH Aachen, Lochnerstrasse 4-20, D-5100 Aachen (DE)

Seismograms from local earthquakes recorded on Milos have been analyzed for shear-wave splitting diagnostic of seismic anisotropy. Many complex P- and shear wave trains were observed, indicating the presence of much heterogeneity, but shear-wave splitting was identified in most shear-wave arrivals within the shear-wave window. The polarizations of the leading shear-waves show alignments which in general are consistent at each station and at groups of stations, suggesting the presence of vertical cracks aligned approximately north-south along the propagation paths. This crack distribution probably exists within only a few kilometres from the surface, since it does not appear to be aligned by the stress field at earthquake source depths.

• OSTI ID: 5276865
• Journal Information: Geothermics; (USA), Journal Name: Geothermics; (USA) Vol. 18:4; ISSN GTMCA; ISSN 0375-6505
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
150301* -- Geothermal Exploration & Exploration Technology-- Geophysical Techniques & Surveys
58 GEOSCIENCES
580000 -- Geosciences
ANISOTROPY
CRACK PROPAGATION
DATA ANALYSIS
DEVELOPING COUNTRIES
EARTHQUAKES
EASTERN EUROPE
EUROPE
GREECE
MEASURING INSTRUMENTS
SEISMIC ARRAYS
SEISMIC DETECTORS
SEISMIC EVENTS
SEISMIC P WAVES
SEISMIC S WAVES
SEISMIC WAVES
SEISMOGRAPHS
SEISMOLOGY