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The SR
phenomenon (Shebalin and
Keilis-Borok, 1999) :
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Zones of
relatively high seismic activity
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become
unusually quiescent while zones
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of relatively
low seismic activity are
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unusually
active. This takes place a few
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months prior
to an approaching strong
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earthquake
within a distance of about 100
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km (i.e. about
ten times larger than the
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incipient source) from
its future epicenter.
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