1-20 OF 50 RESULTS FOR

GERESS

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article
Published: 01 November 2003
Seismological Research Letters (2003) 74 (6): 803–816.
...Karl Koch; Klaus Stammler Up to now the detection and elimination of such timing errors was considered an unsolvable problem. This would certainly be true if the GERESS array were a single- (or three-) component station. However, an array provides the chance to use waveform correlation...
FIGURES | View All (9)
Journal Article
Published: 01 June 2003
Bulletin of the Seismological Society of America (2003) 93 (3): 1051–1064.
...V. Schlindwein; K. Koch Abstract Site effects were studied for the individual sites of the 25 elements of the German Experimental Seismic System (GERESS) array based on the traditional spectral ratio (TSR) technique and horizontal-to-vertical ratios (HVRs) for earthquakes and microtremors, commonly...
FIGURES | View All (9)
Journal Article
Published: 01 February 1996
Bulletin of the Seismological Society of America (1996) 86 (1A): 172–190.
...M. L. Jost; J. Schweitzer; H.-P. Harjes Abstract Since the installation of the 25-element GERman Experimental Seismic System ( GERESS ) array in southeastern Germany in 1990, 36 presumed nuclear tests were recorded by this system: 16 from Nevada, 12 from the Tuamotu Archipelago, 7 from Lop Nor...
Journal Article
Published: 01 October 1995
Bulletin of the Seismological Society of America (1995) 85 (5): 1456–1463.
...Götz H. R. Bokelmann Abstract For high signal-to-noise ratio events, body-wave travel times at GERESS stations are well fit by a plane-wave model corresponding to travel time uncertainties of about 1/100 sec. Slownesses obtained in this study are accurate to about 0.5 sec/deg, while azimuth...
Image
Geographical location of the geress array and the seismic events given in Table 1, which were used for determining the site response. The panel to the right shows the geometry and instrumentation of the geress array.
Published: 01 June 2003
Figure 1. Geographical location of the geress array and the seismic events given in Table 1 , which were used for determining the site response. The panel to the right shows the geometry and instrumentation of the geress array.
Image
▴ Results of frequency wave-number analysis of the Sn phase from the regional event shown in Figure 2B. Top F-K plot for the uncorrected GERESS recordings; bottom: F-K results for the time-corrected GERESS seismograms.
Published: 01 November 2003
Figure 3. ▴ Results of frequency wave-number analysis of the Sn phase from the regional event shown in Figure 2B . Top F-K plot for the uncorrected GERESS recordings; bottom: F-K results for the time-corrected GERESS seismograms.
Image
▴ Map of the geographic location and array configuration of the GERESS array (inset) installed in the Bavarian Forest in Germany in 1990. This regional array consists of 25 elements arranged in four concentric rings with a maximum diameter of about 4 km. Stations are equipped with short-period vertical sensors. The fan reaching from west to northwest highlights the incidence directions of the overwhelming number of microseismic signals studied herein, which appear to be generated in regions off the coast of France (Bretagne) or off the coast of Ireland.
Published: 01 November 2003
Figure 1. ▴ Map of the geographic location and array configuration of the GERESS array (inset) installed in the Bavarian Forest in Germany in 1990. This regional array consists of 25 elements arranged in four concentric rings with a maximum diameter of about 4 km. Stations are equipped
Journal Article
Published: 01 October 1993
Bulletin of the Seismological Society of America (1993) 83 (5): 1507–1526.
... it has been operated continuously to process the data from four high-frequency arrays (adding FINESA in Finland and GERESS in Germany). For some periods data from as many as seven 3-component stations in Eurasia have also been included in the processing. The most important new element is ESAL (Expert...
Image
▴ Histogram of the slowness and azimuth values determined during the moveout correction. The secondary microseisms mostly consist of energy traveling across the GERESS array with a slowness between 15-25 s/° The prominent direction of approach is from the west to northwest.
Published: 01 November 2003
Figure 9. ▴ Histogram of the slowness and azimuth values determined during the moveout correction. The secondary microseisms mostly consist of energy traveling across the GERESS array with a slowness between 15-25 s/° The prominent direction of approach is from the west to northwest.
Journal Article
Published: 01 February 1999
Bulletin of the Seismological Society of America (1999) 89 (1): 156–164.
...Götz H. R. Bokelmann; Stefan Baisch Abstract We study the nature of extremely narrow-band signals that appear in typical long-time spectra of seismic recordings. At the German Experimental Seismic System ( GERESS ) array, we observe several of these time-continuous spectral lines. The most...
Journal Article
Published: 01 October 1996
Bulletin of the Seismological Society of America (1996) 86 (5): 1545–1558.
... explosions, mining blasts, and earthquakes, recorded by the ARCESS and GERESS arrays in Norway and Germany, respectively, station WMQ in China, and stations KNB and MNV in the western United States, are presented and compared. The outlier-test procedure is applied in each region, using Pn/Lg , Pn/Sn , and Pg...
Journal Article
Published: 01 August 1993
Bulletin of the Seismological Society of America (1993) 83 (4): 1184–1212.
...Jan Wüster Abstract Both natural and artificial seismicity is observed in the Vogtland area at near regional distance (180 km) from the GERESS array. This setting offers the opportunity to test various discrimination criteria using a uniform data set of 39 earthquakes and 22 chemical explosions...
Journal Article
Published: 01 December 1990
Bulletin of the Seismological Society of America (1990) 80 (6B): 1777–1800.
... for analysis jointly with existing arrays. The first additional data to become available will be from the GERESS array, which will be established in the Federal Republic of Germany in 1990. Future perspectives also include the use of expert system technology in the data analysis, and the IMS system already...
Journal Article
Published: 01 December 1990
Bulletin of the Seismological Society of America (1990) 80 (6B): 1801–1817.
.... There is no clear evidence for a negative noise correlation distance at these frequencies. Signal coherence in the same frequency bands proved to be excellent (>0.9) for all regional phases over the 3 km aperture of the test array. The final configuration of the new regional array in the BF area—named GERESS—has...
Journal Article
Published: 01 December 1990
Bulletin of the Seismological Society of America (1990) 80 (6B): 2261–2281.
... and at test sites of Novaya Zemlya and eastern Kazakh. Also, recordings at the Graefenburg array, near the new GERESS regional array, of Novaya Zemlya events and an eastern European platform (White Sea) event have been compared with the Norwegian array recordings of the same events. The White Sea explosion...
Image
▴ (A) Example of timing errors observed at four elements (GEB2, GEB5, GEC2, GED6) for a teleseismic event in the Kuril Islands region (origin time 14 July 1997 16:09:35.5UT; latitude 43.25° 9 longitude 146.38° Mw 6.1). (B) GERESS records from a regional event in northern Italy (origin time 19 April 2000 12:22:58.3 UT; latitude 44.30°N, 11.98°E; mb 4.0) with timing errors at six stations. Timing problems are not as obvious as in (A).
Published: 01 November 2003
Figure 2. ▴ (A) Example of timing errors observed at four elements (GEB2, GEB5, GEC2, GED6) for a teleseismic event in the Kuril Islands region (origin time 14 July 1997 16:09:35.5UT; latitude 43.25° 9 longitude 146.38° M w 6.1). (B) GERESS records from a regional event in northern Italy
Image
▴ Spectra of noise samples and example of data processing carried out to detect timing problems at GERESS. The noise spectra for the short-period and broadband recordings of the vertical component at element GEC2, equipped with both types of sensors, are shown. Secondary microseisms, even though the regional event shown in Figure 2B is included in the shown data, in the period range from 5 to 15 sec are continuously observed as coherent energy and are used to determine waveform offsets indicating timing errors. The box marks the size of the correlated wavelet from reference station GEC2.
Published: 01 November 2003
Figure 4. ▴ Spectra of noise samples and example of data processing carried out to detect timing problems at GERESS. The noise spectra for the short-period and broadband recordings of the vertical component at element GEC2, equipped with both types of sensors, are shown. Secondary microseisms
Journal Article
Published: 01 April 1995
Bulletin of the Seismological Society of America (1995) 85 (2): 653–657.
... GERESS array (Bokelmann, 1995), which are sensitive to anisotropy close to the receivers. In the following, we will discuss these arguments and subsequently show that the Hudson model may in fact give a good fit to the splitting delay data of Vav- 653 654 Comments and Replies pressure is somewhat...
Journal Article
Published: 01 February 1996
Bulletin of the Seismological Society of America (1996) 86 (1A): 159–171.
...) for the Gr~ifenberg and GERESS (Harjes, 1990) arrays for explosions on Mururoa (top) and Fangataufa (bottom). The stations of the 13-element GRF array have been rotated into a common plane; only the theoretical seismogram for the center element GEC2 was calculated for the small-aperture GERESS array...
Journal Article
Published: 01 August 2011
Bulletin of the Seismological Society of America (2011) 101 (4): 1971–1975.
..., it is suggested to take into account the vertical slowness during the slowness estimation as Bokelmann (1995) did for the GERESS array or make static corrections before the slowness estimation as Lindquist et al. (2007) and Tibuleac and Stroujkova (2009) did. Thirdly, one may notice that there are some...
FIGURES | View All (4)