N

Name

Lead time

Origin place

Alarm rate

Estimated PG

Probable mechanism

1

Seismic foreshocks

24 - 20 hours

Ground

~20 - 30%

~10 - 20

Fracturing by WGM

2

Seismic acoustic pulses

16 - 12 hours

Ground

~70%

~20 - 100

Fracturing by WGM

3

ULF pulsating emission

4 - 3 hours

Ground

40 - 50%

~1 - 5

EKE by WGM