Data Report
Phases / Apr-Jun 2011
Contributed by HKC
Our Ref.: HKO 220/172/22
14 March, 2012
Sir/Madam,
Preliminary Seismological Analysis
Enclosed please find the preliminary seismological analysis from April to
June 2011 and from October to December 2011 for the station HKPS. Please note
that following the decommissioning of our long-period seismograph on 31 May 2011,
the following changes have been made to our analysis results:
1. Analyses previously performed with records from the long-period seismograph
accommodated in the cellar of the Observatory are now performed with records
from Hong Kong Po Shan (HKPS) seismograph station located in Mid-Levels on
Hong Kong Island.
2. Prefixes i- and e- are no longer marked to phases.
3. Broadband records include all 3 components.
For enquiries, please contact Mr W C Woo at +852 29268433 or
wcwoo@hko.gov.hk.
Yours faithfully,
(Mr. D.S. Lau)
for Director of the Hong Kong Observatory
Preliminary Analysis of the Seismograph at HKC for Apr 2011
Date Phase Component Time (UTC) ?? Remarks
HHMMSS
Year 2011
1-Apr iP E'N'Z' 120353 Compr.
1-Apr P Z' 171001
2-Apr Nil
3-Apr iP E'N'Z' 141807 Dilat to E
3-Apr iP E'N'Z' 201313 Compr.to N
4-Apr P Z' 113758
5-Apr P Z' 075131 Compr.
5-Apr P E'N'Z' 111925
6-Apr iP E'N'Z' 140719 Compr to NE
7-Apr P E'N'Z' 133027
7-Apr iP E'N'Z' 143836 Compr
8-Apr P Z' 183138
9-Apr iP E'N'Z' 130155 Compr
10-Apr P Z' 090617
11-Apr iP E'N'Z' 082157 Compr
11-Apr P Z' 114818
11-Apr P Z' 175950
11-Apr iP Z' 231356 Dilat
12-Apr iP Z' 051331 Dilat
12-Apr P Z' 194348
13-Apr P Z' 011346
13-Apr iP E'N'Z' 200337 Compr to SW
14-Apr P Z' 061440
15-Apr Nil
16-Apr P Z' 011325
16-Apr P Z' 022459
16-Apr P Z' 204252
17-Apr Nil
18-Apr iP Z' 131526 Compr.
19-Apr Nil
20-Apr Nil
21-Apr iP Z' 004534
21-Apr iP Z' 020106
21-Apr iP Z' 134237 Compr
21-Apr P Z' 161705
22-Apr Nil
23-Apr iP E'N'Z' 042632 Dilat
23-Apr iP Z' 101852 Compr
24-Apr P Z' 225313
24-Apr iP Z' 231343 Compr
25-Apr Nil
26-Apr P Z' 064546
27-Apr Nil
28-Apr P Z' 093338
29-Apr P Z' 090212
29-Apr iP E'N'Z' 131434 Compr to W
29-Apr P Z' 203040
30-Apr Nil
'' Indicates long period records only.
" " Indicates short period records only.
* * Epicentral distance estimated from Jeffreys, H. and Bullen, K.E. Seismological Tables
Preliminary Analysis of the Seismograph at HKC for May 2011
Date Phase Component Time (UTC) ?? Remarks
HHMMSS
Year 2011
1-May P Z' 111128
2-May Nil
3-May Nil
4-May P Z' 082953
4-May iP Z' 174443
5-May P Z' 085050
5-May iP E'N'Z' 150431 Compr.
5-May P Z' 232436
6-May P E'N'Z' 065131
7-May P Z' 205826
8-May P Z' 155645
9-May P Z' 191808
10-May P Z' 083654
10-May iP E'N'Z' 090609 Dilat to SE
10-May P Z' 143746
10-May P Z' 153048
11-May P Z' 012620
11-May P Z' 182029
12-May P Z' 222820
13-May P E' 215511
13-May P E'N' 234143
14-May Nil
15-May P E' 065359
15-May P E'N' 184552
16-May Nil
17-May Nil
18-May Nil
19-May iP E'N'Z' 202655
20-May P Z' 005214
21-May P Z' 131015
21-May P Z' 221201
22-May P Z' 013609
22-May P Z' 145216
22-May P Z' 164413
22-May P Z' 191209
23-May Nil
24-May iP E'N'Z' 034712 Compr
25-May Nil
26-May Nil
27-May Nil
28-May P Z' 171316
28-May P Z' 202158
29-May P Z' 183032
30-May Nil
31-May Nil
'' Indicates long period records only.
" " Indicates short period records only.
* * Epicentral distance estimated from Jeffreys, H. and Bullen, K.E. Seismological Tables
Preliminary Analysis of the Seismograph at HKPS for Jun 2011
Date Phase Component Time (UTC) ?? Remarks
HHMMSS
Year 2011
1-Jun Nil
2-Jun Nil
3-Jun P ENZ 001112 Compr to SW
P ENZ 073225 Compr to NE
4-Jun Nil
5-Jun Nil
6-Jun Nil
7-Jun Nil
8-Jun Nil
9-Jun Nil
10-Jun Nil
11-Jun Nil
12-Jun Nil
13-Jun P ENZ 143622 Compr to NW
14-Jun Nil
15-Jun Nil
16-Jun Nil
17-Jun Nil
18-Jun P ENZ 113658 Compr to SW
19-Jun Nil
20-Jun Nil
21-Jun Nil
22-Jun P ENZ 215656 Compr to SW
23-Jun Nil
24-Jun P ENZ 032003 Compr to NW
25-Jun Nil
26-Jun Nil
27-Jun Nil
28-Jun Nil
29-Jun Nil
30-Jun Nil
Preliminary Analysis of the Seismograph at HKPS for Oct 2011
Date Phase Component Time (UTC) ?? Remarks
HHMMSS
Year 2011
1-Oct Nil
2-Oct Nil
3-Oct Nil
4-Oct Nil
5-Oct Nil
6-Oct Nil
7-Oct Nil
8-Oct Nil
9-Oct Nil
10-Oct Nil
11-Oct Nil
12-Oct Nil
13-Oct Nil
14-Oct P ENZ 034319 Compr to NW
15-Oct Nil
16-Oct Nil
17-Oct Nil
18-Oct P Z 051327 Compr
19-Oct Nil
20-Oct Nil
21-Oct P ENZ 080847 Compr to NE
21-Oct P ENZ 180947 Compr to NW
22-Oct Nil
23-Oct P ENZ 105141 Compr to NW
24-Oct Nil
25-Oct Nil
26-Oct Nil
27-Oct Nil
28-Oct P Z 191443 Compr
29-Oct Nil
30-Oct Nil
31-Oct Nil
Preliminary Analysis of the Seismograph at HKPS for Nov 2011
Date Phase Component Time (UTC) ?? Remarks
HHMMSS
Year 2011
1-Nov Nil
2-Nov Nil
3-Nov Nil
4-Nov Nil
5-Nov Nil
6-Nov Nil
7-Nov Nil
8-Nov P ENZ 030149 Compr to SW
9-Nov Nil
10-Nov Nil
11-Nov Nil
12-Nov Nil
13-Nov Nil
14-Nov P ENZ 041046 Compr to SE
15-Nov Nil
16-Nov Nil
16-Nov Nil
17-Nov Nil
18-Nov Nil
19-Nov Nil
20-Nov Nil
21-Nov Nil
22-Nov Nil
23-Nov Nil
24-Nov Nil
25-Nov Nil
26-Nov Nil
27-Nov Nil
28-Nov P NZ 091827 Compr to N
28-Nov P ENZ 123521 Compr to NW
29-Nov Nil
30-Nov P ENZ 002904 Compr to NW
Preliminary Analysis of the Seismograph at HKPS for Dec 2011
Date Phase Component Time (UTC) ?? Remarks
HHMMSS
Year 2011
1-Dec Nil
2-Dec Nil
3-Dec Nil
4-Dec Nil
5-Dec Nil
6-Dec Nil
7-Dec Nil
8-Dec Nil
9-Dec Nil
10-Dec Nil
11-Dec Nil
12-Dec Nil
13-Dec P ENZ 075711 Compr to NW
14-Dec P ENZ 051252 Compr to NW
15-Dec Nil
16-Dec Nil
17-Dec Nil
18-Dec Nil
19-Dec Nil
20-Dec Nil
21-Dec Nil
22-Dec Nil
23-Dec Nil
24-Dec Nil
25-Dec Nil
26-Dec Nil
27-Dec Nil
28-Dec Nil
29-Dec Nil
30-Dec Nil
31-Dec Nil