KAP04 LMT Time Series Data

SAMTEX station map

SAMTEX station map

The Kaapvaal 2004 (KAP04) long period 5-component magnetotelluric time series data available for download consists of the time series from thirteen simultaneously recording long period sites distributed in a NE-SE/NW-SE cross in the eastern part of the Kaapvaal Craton (shown on map above in blue) recorded using GSC LIMS systems and Phoenix LRMT clones in October 2004 as part of the SAMTEX project. The data are in (zip compressed) TS ASCII format, and are 5 second sampling for around a month at each site. The sites are numbered with site KAP301 closest to the coast, with approximately 60 km between sites.

These data are heavily contaminated by DC signals both from the two DC train lines running from Durban to Johannesburg, and also these DC signals are transmitted along the NW-SE pipeline from Durban to Johannesburg. We currently do not have usable MT transfer functions from any of these data.

The data are in GEOMAGNETIC co-ordinates.

The only instrument response that has to be considered are the nominally 30,000s 2-pole Butterworth high-pass filters on the electric channels. These filters can easily be corrected in the frequency domain, either to the spectra or to the response estimates. (Note: Correct values will be entered here and in the hardware.kap file if found)

Their locations coordinates, recording times, instrument numbers and 30,000s -3dB periods are:-

Station Latitude Longitude Recording time Instrument 30,000s Ex, Ey
KAP301 -28.92 30.84 2004-10-01 15:00:00 - 2004-11-02 07:24:09 059 30002, 29939
KAP307 -28.31 29.89 2004-10-02 16:00:00 - 2004-11-02 13:00:29 003 30000, 30000
KAP310 -27.99 29.40 2004-10-03 13:00:00 - 2004-11-03 08:53:19 060 29845, 29939
KAP313 -27.66 28.94 2004-10-04 13:30:00 - 2004-11-03 11:40:24 019 30000, 30000
KAP316 -27.34 28.44 2004-10-05 14:00:00 - 2004-11-03 14:03:14 064 30065, 29908
KAP319 -27.02 27.99 2004-10-06 11:00:00 - 2004-11-04 07:53:09 058 29750, 29845
KAP501 -28.32 28.22 2004-10-07 11:30:00 - 2004-11-04 06:24:44 004 30000, 30000
KAP504 -27.91 28.63 2004-10-08 14:00:00 - 2004-11-03 10:04:54 052 29971, 29971
KAP508 -27.42 29.20 2004-10-09 10:00:00 - 2004-11-03 07:31:49 053 30034, 30128
KAP511 -27.04 29.61 2004-10-09 15:00:00 - 2004-11-02 13:32:34 067 29908, 29971
KAP513 -26.78 29.93 2004-10-10 11:00:00 - 2004-11-02 11:07:19 056 30096, 29845
KAP516 -26.40 30.35 2004-10-11 11:00:00 - 2004-11-02 07:32:44 068 30002, 30065
KAP519 -26.03 30.77 2004-10-11 16:00:00 - 2004-11-01 13:31:24 063 29908, 29908

Acknowledgements

If you download these data and present or publish them, you are obliged to acknowledge the SAMTEX Consortium as their source. The relevant reference is the SAMTEX overview paper by Jones et al. (2009):
Jones, A.G., R.L. Evans, M.R. Muller, M.P. Hamilton, M.P. Miensopust, X. Garcia, P. Cole, T. Ngwisanyi, D. Hutchins, C.J.S Fourie, H. Jelsma, T. Aravanis, W. Pettit, S. Webb, J. Wasborg, and The SAMTEX Team, 2009.
Area selection for diamonds using magnetotellurics: Examples from southern Africa.
Lithos, 112S, 83-92, doi: 10.1016/j.lithos.2009.06.011. [PDF]
and the Acknowledgements in that paper list all financial and logistical supporters.

Download data and files

The TS ASCII formatted data are stored in zip compression.

Published papers using KAP04 long period dataset

There are currently no papers published using these data. If you use these data in a publication, please inform Alan Jones so that it can added to the list below.