Electromagnetic Fault for Earthquake Lightning
A density of bound charges, q , which cancel piezoelectric polarization, appears at a fault zone upon the disappearance of piezoelectricity due to the release of seismic stress, σ. q is described as d q / d t =-α dσ/ d t - q / ε ρ, where α, ε and ρ are the piezoelectric coefficient, the dielectric c...
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| Published in | Japanese Journal of Applied Physics Vol. 35; no. 3A; p. L355 |
|---|---|
| Main Authors | , |
| Format | Journal Article |
| Language | English |
| Published |
01.03.1996
|
| Online Access | Get full text |
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| Summary: | A density of bound charges,
q
, which cancel piezoelectric polarization, appears at a fault zone upon the disappearance of piezoelectricity due to the release of seismic stress, σ.
q
is described as d
q
/ d
t
=-α dσ/ d
t
-
q
/
ε
ρ, where α,
ε
and ρ are the piezoelectric coefficient, the dielectric constant and the resistivity of the earth, respectively. A model of a fault with length 2
a
and displacement time τ gives
q
=[ασ
0
ε
ρτ(β/
a
)/(τ-
ε
ρ)]( e
-
t
/τ
- e
-
t
/
ε
ρ
) using the velocity of s-waves, β and the stress along the fault plane, σ
0
. The intensity of earthquake lightning (EQL) and its spatial distribution are calculated based on the excitation of molecules by electrons accelerated under an electric field using the assumed q, taking atmospheric polarization into account. |
|---|---|
| ISSN: | 0021-4922 1347-4065 |
| DOI: | 10.1143/JJAP.35.L355 |