Helium-gases) happens along open fissures which are 
part of the fault pattern. 
2. Remote sensing observations 
For the remote sensing interpretation of the study area 
and neighbouring regions(Bankwitz et al., 1998) various 
imageries have been used: scenes from MOMS 02 P 
(from the MIR station, 12. 3. 97), Landsat-5 TM (7.7.89; 
Fig. 2), IRS-1C (23.8.96), Spot and older Landsat and 
from ERS-1(SAR). The ground resolution of 18 m of the 
MOMS data and its spectral band arrangement facilitated 
the geological interpretation. 
The lineation pattern was extracted from the satellite 
images and combined with data from geological maps. 
The fault pattern enlarges the hitherto existing 
knowledge, especially concerning the widespread 
occurrence of E-W lineaments. The area is dominated by 
the NNW to NW trending Marienbad and the Tachov 
fault which border the Tachov-Domazlice graben, located 
to the west and geologically characterized by relics of 
Cretaceous basins. This fault zone is of complex 
structure. Ca. N-S running faults are frequently offset by 
secondary E-W- faults. E-W trending linear structures 
can be recognized over more than 50 km. They correlate 
with E-W structures in detailed gravimetric maps 
(unpublished, kind information by J. Svancara, 1998). 
Causal relationships between both types of linear features 
(from remote sensing data and from gravity data) seems 
to exist, but the problem needs further studies. Two of 
these photolineaments crosscut obliquely the Eger graben 
filling. Therefore the E-W linear elements should be of 
the youngest age. Besides that the border faults of the 
WSW-ENE Eger graben are offset along lineations with 
NNW direction (Fig. 3 and 4). 
  
  
  
   
  
  
Landsat TM 
area with 
_ earthquake swarms 
  
  
  
  
  
Fig. 3 The main structure of the Marienbad fault and other linear features, taken from a Landsat TM scene (ca. 97 - 88 
km, see text). The neotectonic structures of the Eger (Cheb) basin and Eger rift are marked by dots. The dominance of 
prominent N-S and E-W lineaments is a significant difference to geologically mapped faults. Kli: Klingenthal, MB: 
Marienbad (Marianske Lazne); MR: Marktredwitz,. 
584 Intemational Archives of Photogrammetry and Remote Sensing. Vol. XXXII, Part 7, Budapest, 1998 
  
  
Ref 
Ban 
Fotc 
Pub 
pres 
Beh 
Cru: 
the 
22.4 
Bon 
the « 
Wes 
282 
199( 
1985 
Tect 
Horz 
The 
the 
ved.,