Pore pressure sensitivities to dynamic strains: Observations in active tectonic regions

Formation of Active Regions: Observations and Theory

Active regions can be used as a diagnostic of the sub-photo-spheric activity. In this review I will discuss how the physical conditions in the subsurface layers of the Sun form and modify the three dimensional complex of the active region. Many characteristics of active regions are related to the conditions under which magnetic ux tubes are generated and to their evolution as they rise in the s...

Active tectonic evidences related to the Main Recent Fault in the Sarvabad region, NW Iran

-Introduction The Main Recent Fault (MRF) is a seismic structure on the northwestern boundary of the Zagros belt and southern border of the Sanandaj-Sirjan belt. This fault as a major strike-slip fault consists of several segments in the Zagros collision zone. The seismic activity of the southwestern segments is greater than the northwestern segments. Several earthquake events have occurred al...

active tectonic in binalud mountain with respect to morphotectonic

introduction tectonic of binaloud mountain ranges is controled by thrust faults system and folds related to these faults. parts of this mountain ranges and neyshabour plain is as study area in north eastern iran and between latitudes 36° 11´ 00 to 36° 30´ 00 and longitudes 58° 35´ 00 to 59° 00´ 00. in this paper we first study morphometric indices in this area then analyze drainages and allovia...

Helical Magnetic Fields in Solar Active Regions: Theory vs. Observations

The mean value of the normalized current helicity αp = B · (∇×B)/B 2 in solar active regions is on the order of 10 m, negative in the northern hemisphere, positive in the southern hemisphere. Observations indicate that this helicity has a subsurface origin. Possible mechanisms leading to a twist of this amplitude in magnetic flux tubes include the solar dynamo, convective buffeting of rising fl...

Some Observations on Clostridium perfringens Strains Isolated in IRAN