Data list is divided in thirteen columns. Each column represents data for an earthquake event which was recorded in Borehole Seismometer Station (view profile) in Dakeng, East Taichung.

Example:

date time @ P P latitude longitude magnitude tS-tP max. amplitude type sh.period station Info
@ (hour) (min) (s) (s) @ @ @ @ (10-5 cm/s) @ @ @
20061105 0 29 17 1757 @ @ @ @ 3 2E 2 improper functioning of BHS 6
20061105 0 50 29 3029 @ @ @ @ 1 2F @ improper functioning of BHS 6

 

First column: event date

 

Second, third, fourth and fifth: event arrival time to BHS (the second represents hour, third- minutes and fourth- seconds. The fifth one shows arrival in seconds in total- without minutes). So:

for analysis you can pick the second and fifth column:

time @ P P
(hour) (min) (s) (s)
0 29 17 1757
0 50 29 3029

 

or the second, third and fourth:

time @ P P
(hour) (min) (s) (s)
0 29 17 1757
0 50 29 3029

 

 

Sixth and seventh: event location

 

Eighth: event magnitude

 

Ninth: time difference between S and P wave (sec)

 

Tenth: maximum of the ampitude

 

Eleventh: this is type of events. We have divided events into four groups. First two groups are divided into three classes.

1A- local event

1B- P wave amplitude is larger than S wave

1C- far field event ts-tp > 6 seconds

2D- there is a phase after P wave

2E- unable to indentify

2F- one pick event (P wave?)

3- no regular earthquake event

4- tremor (V= 1500 m/s, duration time = 0.05 sec)

See the data BHS procedure

 

Twelfth: number of short period stations recored this event (see the location)

 

Thirteenth: additional information about an event