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LAND

The seismic network on the Island employed 13 permanent and 20 mobile 3D component digital seismic stations, equipped with short period or broad band seismometers and GPS receivers, and was installed and monitored by INGV and University of Florence personnel. The mobile stations were located aiming to achieve the best coverage on the volcano, despite of accessibility difficulties. Tables 7, [*], 9 and 10 report the instrumental characteristics and settings of each station. Figures 12 and 13 show some of the deployed stations. The data of the permanent stations are transmitted in real-time, via radio-modem UHF or Wi-Fi, to the San Vincenzo Observatory located in Stromboli and sent by the Internet (GARR) to INGV in Catania and Osservatorio Vesuviano in Napoli, whereas the mobile stations recorded the data locally on flash memory and optical and hard disks.

The network was tested and checked in advance and during the experiment at the Advanced Operating Center (DPC-INGV) of the San Vincenzo Observatory, and the real time data availablity resulted extremely useuful for calibrating and running of the seismic shooting operations at sea.


Table 5: Station Data.
STA_ID TYPE LON LAT EAST NORTH H DIGITIZER ORG
  WGS-84 WGS-84 UTM-33 UTM-33 A.S.L.      
TS01 LAND 38.797475 15.222333 519307 1000000 560 CMG-DM24 UNIFI
TS02 LAND 38.797540 15.216196 518774 1000000 750 CMG-DM24 UNIFI
TS03 LAND 38.789767 15.218890 519010 1000000 610 CMG-DM24 UNIFI
TS04 LAND 38.788537 15.230676 520034 1000000 20 CMG-DM24 UNIFI
TS05 LAND 38.806960 15.214911 518660 1000000 207 130 INGV-CNT
TS06 LAND 38.803324 15.222156 519290 1000000 196 130 INGV-CNT
TS07 LAND 38.802853 15.227740 519775 1000000 112 130 INGV-CNT
TS08 LAND 38.809833 15.225424 519572 1000000 11 130 INGV-CNT
TS09 LAND 38.806387 15.231747 520122 1000000 39 MARSlite INGV-OV
TS10 LAND 38.802715 15.238265 520689 1000000 43 MARSlite INGV-OV
TS11 LAND 38.796688 15.237658 520638 1000000 10 MARSlite INGV-OV
TS12 LAND 38.793512 15.235160 520422 1000000 25 MARSlite INGV-OV
TS13 LAND 38.777185 15.224584 519508 1000000 43 TAURUS INGV-CT
TS14 LAND 38.805914 15.210370 518266 1000000 37 TAURUS INGV-CT
TS15 LAND 38.795482 15.192318 516701 1000000 105 TAURUS INGV-CT
TS16 LAND 38.789325 15.193637 516817 1000000 170 TAURUS INGV-CT
TS17 LAND 38.784500 15.196169 517038 1000000 159 TAURUS INGV-CT
TS18 LAND 38.786499 15.191661 516646 1000000 103 TAURUS INGV-CT
TS19 LAND 38.802567 15.234350 520349 1000000 70 130 INGV-CNT
TS20 LAND 38.806129 15.239175 520767 1000000 1 MARSlite INGV-OV
STR1 LAND 38.795100 15.224050 519457 1000000 561 GAIA INGV-OV
STR3 LAND 38.799267 15.230633 520027 1000000 236 GAIA INGV-OV
STR4 LAND 38.773850 15.211500 518372 1000000 86 GAIA-1 INGV-OV
STR5 LAND 38.788400 15.203750 517696 1000000 654 GAIA-1 INGV-OV
STR6 LAND 38.787350 15.215983 518758 1000000 808 GAIA-2 INGV-OV
STR8 LAND 38.799610 15.218650 518987 1000000 569 GAIA-1 INGV-OV
STR9 LAND 38.791117 15.207367 518009 1000000 782 GAIA-1 INGV-OV
STRA LAND 38.795233 15.217117 518855 1000000 842 GAIA-1 INGV-OV
STRB LAND 38.791067 15.203167 517644 1000000 632 GAIA-1 INGV-OV
STRC LAND 38.791033 15.191567 516637 1000000 183 GAIA-1 INGV-OV
STRD LAND 38.783383 15.216333 518790 1000000 559 GAIA-1 INGV-OV
STRE LAND 38.802369 15.215164 518683 1000000 436 GAIA-1 INGV-OV
STRG LAND 38.809906 15.218000 518927 1000000 118 GAIA-2 INGV-OV
OBS01 OBS 38.735278 15.352477 530635 1000000 -1834 SEDIS-V NULL
OBS02 OBS 38.745815 15.321006 527896 1000000 -1740 SEDIS-V NULL
OBS03 OBS 38.756781 15.291523 525330 1000000 -1561 SEDIS-V NULL
OBS04 OBS 38.712601 15.200574 517438 1000000 -1333 SEDIS-V NULL
OBS05 OBS 38.729928 15.204264 517755 1000000 -1266 SEDIS-V NULL
OBS06 OBS 38.739221 15.138557 512042 1000000 -1385 SEDIS-V NULL
OBS07 OBS 38.754779 15.159988 513901 1000000 -1294 SEDIS-V NULL
OBS08 OBS 38.725843 15.171652 514921 1000000 -1282 SEDIS-V NULL
OBS09 OBS 38.740514 15.180400 515678 1000000 -1176 SEDIS-V NULL
OBS10 OBS 38.821289 15.250381 521735 1000000 -98 SEDIS-V NULL



Table 6: Station Data.
STA_ID DATE_S TIME_S DATE_E TIME_E DIGITIZER SENSOR P S_F C_F
              s Hz $\mu$ V / m/s
OBS01 2006-11-29 05:26:44 2006-12-02 08:27:57 SEDIS-V SM6-B-Coil 4.50 250.00 0.00281154
OBS02 2006-11-29 05:58:24 2006-12-02 09:50:49 SEDIS-V SM6-B-Coil 4.50 250.00 0.00281154
OBS03 2006-11-29 06:29:22 2006-12-02 12:59:24 SEDIS-V SM6-B-Coil 4.50 250.00 0.00281154
OBS04 2006-11-29 07:13:50 2006-12-02 14:23:35 SEDIS-V SM6-B-Coil 4.50 250.00 0.00281154
OBS05 2006-11-29 07:29:24 2006-12-02 15:19:44 SEDIS-V SM6-B-Coil 4.50 250.00 0.00281154
OBS06 2006-11-29 07:56:28 2006-12-02 17:36:13 SEDIS-V SM6-B-Coil 4.50 250.00 0.00281154
OBS07 2006-11-29 08:11:52 2006-12-02 19:15:56 SEDIS-V SM6-B-Coil 4.50 250.00 0.00281154
OBS08 2006-11-29 08:34:12 2006-12-02 16:45:27 SEDIS-V SM6-B-Coil 4.50 250.00 0.00281154
OBS09 2006-11-29 08:46:16 2006-12-02 16:07:09 SEDIS-V SM6-B-Coil 4.50 250.00 0.00281154
OBS10 2006-11-29 09:41:58 2006-12-02 20:37:20 SEDIS-V SM6-B-Coil 4.50 250.00 0.00281154
STR1 2006-11-29 00:00:00 2006-12-02 12:00:00 GAIA CMG-40T 60.00 50.00 2.30000000
STR3 2006-11-29 00:00:00 2006-12-02 12:00:00 GAIA CMG-40T 60.00 50.00 2.30000000
STR4 2006-11-29 00:00:00 2006-12-02 12:30:00 GAIA-1 CMG-40T 60.00 50.00 2.30000000
STR5 2006-11-29 00:00:00 2006-12-02 23:00:00 GAIA-1 CMG-40T 60.00 50.00 2.30000000
STR6 2006-11-29 00:00:00 2006-12-02 23:00:00 GAIA-2 CMG-40T 60.00 50.00 2.30000000
STR8 2006-11-29 00:00:00 2006-12-02 12:00:00 GAIA-1 CMG-40T 60.00 50.00 2.30000000
STR9 2006-11-29 00:00:00 2006-12-02 23:00:00 GAIA-1 CMG-40T 60.00 50.00 2.30000000
STRA 2006-11-29 00:00:00 2006-12-02 12:00:00 GAIA-1 CMG-40T 60.00 50.00 2.30000000
STRB 2006-11-29 00:00:00 2006-12-02 23:00:00 GAIA-1 CMG-40T 60.00 50.00 2.30000000
STRC 2006-11-29 00:00:00 2006-12-02 12:30:00 GAIA-1 CMG-40T 60.00 50.00 2.30000000
STRD 2006-11-29 00:00:00 2006-12-02 23:00:00 GAIA-1 CMG-40T 60.00 50.00 2.30000000
STRE 2006-11-29 00:00:00 2006-12-02 12:30:00 GAIA-1 CMG-40T 60.00 50.00 2.30000000
STRG 2006-11-29 00:00:00 2006-12-02 12:30:00 GAIA-2 CMG-40T 60.00 50.00 2.30000000
TS01 2006-11-29 00:00:00 2006-12-02 09:00:00 CMG-DM24 LE-3D/5 5.00 100.00 3.20000000
TS02 2006-11-29 00:00:00 2006-12-02 10:00:00 CMG-DM24 LE-3D/5 5.00 100.00 3.20000000
TS03 2006-11-29 00:00:00 2006-12-02 11:00:00 CMG-DM24 LE-3D/5 5.00 100.00 3.20000000
TS04 2006-11-29 00:00:00 2006-12-02 13:00:00 CMG-DM24 LE-3D/5 5.00 100.00 3.20000000
TS05 2006-11-29 19:00:00 2006-12-01 09:00:00 130 LE-3Dlite 1.00 125.00 1.50000000
TS06 2006-11-29 19:00:00 2006-12-01 23:00:00 130 LE-3Dlite 1.00 125.00 1.50000000
TS07 2006-11-29 19:00:00 2006-12-02 06:00:00 130 LE-3Dlite 1.00 125.00 1.50000000
TS08 2006-11-29 19:00:00 2006-12-01 01:00:00 130 LE-3Dlite 1.00 125.00 1.50000000
TS09 2006-11-27 16:09:16 2006-12-02 11:00:00 MARSlite LE-3Dlite 1.00 125.00 32.00000000
TS10 2006-11-26 13:56:40 2006-12-02 10:00:00 MARSlite LE-3Dlite 1.00 125.00 32.00000000
TS11 2006-11-26 09:40:52 2006-12-02 09:00:00 MARSlite LE-3Dlite 1.00 125.00 32.00000000
TS12 1899-12-30 00:00:00 1899-12-30 00:00:00 MARSlite LE-3Dlite 1.00 125.00 32.00000000
TS13 2006-11-26 10:00:00 2006-12-02 06:00:00 TAURUS LE-3D/20 20.00 100.00 1.00000000
TS14 2006-11-26 08:00:00 2006-12-01 23:00:00 TAURUS LE-3D/20 20.00 100.00 1.00000000
TS15 2006-11-25 11:00:00 2006-12-01 23:00:00 TAURUS LE-3D/20 20.00 100.00 1.00000000
TS16 2006-11-27 10:00:00 2006-12-02 08:00:00 TAURUS LE-3D/20 20.00 100.00 1.00000000
TS17 2006-11-26 09:00:00 2006-12-02 08:00:00 TAURUS LE-3D/20 20.00 100.00 1.00000000
TS18 2006-11-25 10:00:00 2006-12-01 23:00:00 TAURUS LE-3D/20 20.00 100.00 1.00000000
TS19 2006-11-29 19:00:00 2006-12-02 06:00:00 130 LE-3Dlite 1.00 125.00 1.50000000
TS20 2006-11-29 08:58:08 2006-12-02 10:00:00 MARSlite LE-3Dlite 1.00 125.00 32.00000000



Table 7: Land Station Data.
STA LON LAT EAST NORTH H DIGITIZER ORG
  WGS-84 WGS-84 UTM-33 UTM-33 A.S.L.    
TS01 1513.34000 3847.84848 519307 4294326 560 CMG-DM24 UNIFI
TS02 1512.97174 3847.85242 518774 4294332 750 CMG-DM24 UNIFI
TS03 1513.13337 3847.38604 519010 4293470 610 CMG-DM24 UNIFI
TS04 1513.84058 3847.31222 520034 4293336 20 CMG-DM24 UNIFI
TS05 1512.89467 3848.41759 518660 4295377 207 RFTK130 INGV-CNT
TS06 1513.32934 3848.19942 519290 4294975 196 RFTK130 INGV-CNT
TS07 1513.66438 3848.17120 519775 4294924 112 RFTK130 INGV-CNT
TS08 1513.52543 3848.58997 519572 4295698 11 RFTK130 INGV-CNT
TS09 1513.90484 3848.38322 520122 4295317 39 MARSlite INGV-OV
TS10 1514.29592 3848.16291 520689 4294911 43 MARSlite INGV-OV
TS11 1514.25948 3847.80126 520638 4294242 10 MARSlite INGV-OV
TS12 1514.10961 3847.61069 520422 4293889 25 MARSlite INGV-OV
TS13 1513.47505 3846.63111 519508 4292075 43 TAURUS INGV-CT
TS14 1512.62222 3848.35483 518266 4295260 37 TAURUS INGV-CT
TS15 1511.53908 3847.72894 516701 4294099 105 TAURUS INGV-CT
TS16 1511.61823 3847.35951 516817 4293416 170 TAURUS INGV-CT
TS17 1511.77012 3847.06998 517038 4292881 159 TAURUS INGV-CT
TS18 1511.49964 3847.18993 516646 4293102 103 TAURUS INGV-CT
TS19 1514.06100 3848.15400 520349 4294894 70 RFTK130 INGV-CNT
TS20 1514.35050 3848.36772 520767 4295290 1 MARSlite INGV-OV
STR1 1513.44300 3847.70600 519457 4294063 561 GAIA INGV-OV
STR3 1513.83800 3847.95600 520027 4294527 236 GAIA INGV-OV
STR4 1512.69000 3846.43100 518372 4291702 86 GAIA-1 INGV-OV
STR5 1512.22500 3847.30400 517696 4293315 654 GAIA-1 INGV-OV
STR6 1512.95900 3847.24100 518758 4293201 808 GAIA-2 INGV-OV
STR8 1513.11900 3847.97660 518987 4294562 569 GAIA-1 INGV-OV
STR9 1512.44200 3847.46700 518009 4293617 782 GAIA-1 INGV-OV
STRA 1513.02700 3847.71400 518855 4294076 842 GAIA-1 INGV-OV
STRB 1512.19000 3847.46400 517644 4293611 632 GAIA-1 INGV-OV
STRC 1511.49400 3847.46200 516637 4293605 183 GAIA-1 INGV-OV
STRD 1512.98000 3847.00300 518790 4292761 559 GAIA-1 INGV-OV
STRE 1512.90983 3848.14217 518683 4294868 436 GAIA-1 INGV-OV
STRG 1513.08000 3848.59433 518927 4295705 118 GAIA-2 INGV-OV



Table 8: Land Station Data.
STATION START END DIGITIZER SENSOR P S/R
          s Hz
TS01 39049.4583333333 39053.375 CMG-DM24 LE-3D/5 5 100
TS02 39049.5 39053.4166666667 CMG-DM24 LE-3D/5 5 100
TS03 39049.5833333333 39053.4583333333 CMG-DM24 LE-3D/5 5 100
TS04 39049.6666666667 39053.5416666667 CMG-DM24 LE-3D/5 5 100
TS05 39048 39052.375 RFTK130 LE-3Dlite 1 125
TS06 39048.5 39052.9583333333 RFTK130 LE-3Dlite 1 125
TS07 39048.5416666667 39053.375 RFTK130 LE-3Dlite 1 125
TS08 39048 39052.0416666667 RFTK130 LE-3Dlite 1 125
TS09 39048.6666666667 39053.4583333333 MARSlite LE-3Dlite 1 125
TS10 39047.5833333333 39053.4166666667 MARSlite LE-3Dlite 1 125
TS11 39047.4166666667 39053.375 MARSlite LE-3Dlite 1 125
TS12     MARSlite LE-3Dlite 1 125
TS13 39047.4166666667 39053.3333333333 TAURUS LE-3D/20 20 100
TS14 39047.4166666667 39052.375 TAURUS LE-3D/20 20 100
TS15 39046.4583333333 39052.375 TAURUS LE-3D/20 20 100
TS16 39048.4166666667 39053.3333333333 TAURUS LE-3D/20 20 100
TS17 39047.4166666667 39053.3333333333 TAURUS LE-3D/20 20 100
TS18 39046.4166666667 39052.375 TAURUS LE-3D/20 20 100
TS19 39049.6666666667 39053.4583333333 RFTK130 LE-3Dlite 1 125
TS20 39050.375 39053.4166666667 MARSlite LE-3Dlite 1 125
STR1 39050 39053.6666666667 GAIA -CMG-40T 60 50
STR3 39050 39053.6666666667 GAIA -CMG-40T 60 50
STR4 39050 39053.6666666667 GAIA-1 -CMG-40T 60 50
STR5 39050 39053.6666666667 GAIA-1 -CMG-40T 60 50
STR6 39050 39053.6666666667 GAIA-2 -CMG-40T 60 50
STR8 39050 39053.6666666667 GAIA-1 -CMG-40T 60 50
STR9 39050 39053.6666666667 GAIA-1 -CMG-40T 60 50
STRA 39050 39053.6666666667 GAIA-1 -CMG-40T 60 50
STRB 39050 39053.6666666667 GAIA-1 -CMG-40T 60 50
STRC 39050 39053.6666666667 GAIA-1 -CMG-40T 60 50
STRD 39050 39053.6666666667 GAIA-1 -CMG-40T 60 50
STRE 39050 39053.6666666667 GAIA-1 -CMG-40T 60 50
STRG 39050 39053.6666666667 GAIA-2 -CMG-40T 60 50



Table 9: Seismic sensor characteristics.
Model CMG-40T LE-3D/5s LE-3D/20s LE-3Dlite MkII
Manufacturer Guralp Lennartz Lennartz Lennartz
Sensors orth.(Z,N,E) orth.(Z,N,E) orth.(Z,N,E) orth.(Z,N,E)
Eigenfreq., upper freq.limit 0.0333 Hz, 50 Hz 0.2 Hz, 40 Hz 0.05 Hz, 40 Hz 1 Hz, 80 Hz
Vel.output bandwidth 60s/50Hz      
Vel.output sens. (V/m/s) 800 400 1000 400
RMS noise @1Hz   1 nm/s $<$ 2 nm/s 3 nm/s
Dynamic range(typical)   140 dB 136 dB 136 dB
Poles -0.1481/0.1481j -0.1481/-0.1481 -0.885/+0.887j -0.885/-0.887j -0.427/0.000j -0.220/+0.235j -0.220/-0.235j -0.230/0.000j -4.210/+4.660j -4.210/-4.660j -2.105/0.000j
Zeros Double Zero at origin Triple zero at the origin    



Table 10: Data Acquisition parameters, geophone characteristics and settings.
Station Model GAIA-1 CMG-DM24 REFTEK 130 MARSLite TAURUS
Sampling rate (Hz) 50 100 125 125 100
Period (s) 60 5 1 1 20
Number of channels 3 3 3 3 3
Type of recording continuous continuous continuous continuous continuous
chan.(123-V-H1-H2) CMG-40T LE-3D/5 LE-3Dlite LE-3Dlite LE-3D/20
Vel.out.sens. V m/s 800 400 400 400 1000
Input range(Vref) $\pm$20V $\pm$27V $\pm$10V $\pm$1.05V $\pm$8V
Gain (1,2,3)     1   1
Digitizer Res.(bits) 24(1,2,3) 24(1,2,3) 24(1,2,3) 20(1,2,3) 24(1,2,3)
Digitizer Span          
Conv.Factor (V/C) 2.300E-6 3.20E-6 1.500E-6 32.00E-6 1.00E-6
Cutoff Freq.-3dB          
Cutoff Freq.-130dB          


figure

Figure 12: Mobile Stations (INGV, Catania).
\begin{figure}\centerline{ \epsfig{file=IMG/TS13_INGV_CT.ps,width=8.5cm} \epsfig{file=IMG/TS14_INGV_CT.ps,width=8.5cm} } \end{figure}
figure
Figure 13: Mobile Stations (INGV, Catania).
\begin{figure}\centerline{ \epsfig{file=IMG/TS16_INGV_CT.ps,width=8.5cm} \epsfig{file=IMG/TS17_INGV_CT.ps,width=8.5cm} } \end{figure}

next up previous contents
Next: MARINE Up: SEISMIC NETWORK Previous: SEISMIC NETWORK   Contents
2007-06-18