Telluric
Currents:
telluric: tel·lu·ric: Of or relating to Earth; terrestrial.
U. Eco: "What are telluric currents?" " A great cosmological
metaphor, which refers to the serpent."
Science: An electromagnetic method in which naturally occurring, low-frequency
electric currents (telluric currents), are measured at a base station
and compared with values measured at other stations. The currents are
produced by the Earth's changing magnetic field, as it is affected by
the solar
winds. The normalized measurements of telluric current provide information
about the direction of current flow and the conductance (conductivity
times thickness) of sediments in the surveyed area. Telluric currents
do not flow uniformly through the earth's crust. Rather, they seek out
low resistance rocks, in accordance with Ohm's
Law. Such current concentrations can be detected at the surface with
magnetometers. Extremely low-frequency telluric currents (with periods
of days or months) provide information about conductivity in the deep
interior of the Earth.
Natural electrical currents in the Earth, referred to as telluric currents,
were first identified by Peter
Barlow in 1847.
Magnetotelluric (MT) measurements use the
natural variations in the Earth's magnetic field to probe the crust and
the upper mantle. The periodic and transient fluctuations can be correlated
with diurnal (Opening during daylight hours and closing at night; daily).
variations in the Earth's magnetic fields caused by particles, which
are radiated from our Sun, the solar wind. Depending on the solar activity
the solar wind can strongly affect the shape of the Earth's magnetic
field, which is in general visible through the northern lights (luminous
display of various forms and colors seen in the night sky. Northern Hemisphere:
aurora borealis; Southern Hemisphere: aurora australis.). However, the
interaction of the Earth's magnetic field with the solar wind has direct
influence on electrical currents in the ionosphere (series of concentric
ionized layers forming part of the upper atmosphere of the Earth from
around 50 to 80 km to 400 to 600 km.). These terrestrial current systems
are huge whorls and cover millions of square kilometers. The inductive
mechanism is an electromagnetic field propagated with slight attenuation
(To lessen the density of; rarefy) over large distances
between the ionosphere and the Earth's surface, somehow like a guided
wave. These magnetotelluric fields can penetrate the surface to produce
the telluric currents. The different electrical conductivity of the surface,
crustal and mantle rocks deforms the induced fields in the crust, which
can be measured by MT-experiments.
Menhir: (men stone + hir high.)
A large stone set upright in olden times as a memorial or monument.
Many, of unknown date, are found in Brittany and throughout Northern
Europe.
Dolmen, cromlech: Prehistoric monuments
consisting of monoliths encircling a mound.
he
Celts, however, believed that it was enough to discover the global configuration
of the currents. That's why they erected megaliths. The menhirs had sensitive
devices, like electric valves, planted at the points where the currents
already identified. The dolmens were chambers accumulated energy, where
the Druids, with geomantic tools, attempted to map, by extrapolation,
the global design. The cromlechs and Stonehenge were micro-macrocosmic
observatories from which they studied the pattern of the constellations
ion order to divide the pattern of the currents - because, as the Tabula
Smaragdina tells us, what is above is isomorphic to what is below." U.E.
(F.P.)
distances
between the ionosphere and the Earth's surface, somehow like a guided
wave. These magnetotelluric fields can penetrate the surface to produce
the telluric currents. The different electrical conductivity of the surface,
crustal and mantle rocks deforms the induced fields in the crust, which
can be measured by MT-experiments. 
he
Celts, however, believed that it was enough to discover the global configuration
of the currents. That's why they erected megaliths. The menhirs had sensitive
devices, like electric valves, planted at the points where the currents
already identified. The dolmens were chambers accumulated energy, where
the Druids, with geomantic tools, attempted to map, by extrapolation,
the global design. The cromlechs and Stonehenge were micro-macrocosmic
observatories from which they studied the pattern of the constellations
ion order to divide the pattern of the currents - because, as the