THE ZAMBIAN THE ZAMBIAN SEISMIC SEISMIC NETWORK NETWORK

2009 IRIS/ORFEUS METADATA WORKSHOP BEING HELD IN 2009 IRIS/ORFEUS METADATA WORKSHOP BEING HELD IN NOVEMBER IN CAIRO, EGYPT FROM 8-17 NOVEMBER 2009NOVEMBER IN CAIRO, EGYPT FROM 8-17 NOVEMBER 2009

By A MuloweziBy A Mulowezi

LOCATION OF ZAMBIALOCATION OF ZAMBIA

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Area: total: 752,618 sq km

POPULATION: 12.1Million

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BACKGROUNDBACKGROUND

ZAMBIAN SEISMIC NETWORK

The Government of the Republic of Zambia, through Geological Survey Department operates and maintains a network of five seismic stations. These stations were established way back from 1983 – 1985 with the help from Finland (FINNIDA) these comprises of Lusaka (LSZ) which is the main station and a dial-up the rest are remote these includes Petauke (PTZ) Mansa (MZZ) Isoka (IKZ) and Kasempa (KMZ) all with international codes. It also operates and maintains three Africa Array seismic stations, two are permanent and one temporal. The permanent are Kitwe (KTWE) and Itezhitezhi (TEZI). Mongu (MONG) is temporal. Although Mongu at the moment is still temporal, the Zambian Government has the intention of putting up a permanent structure. 

The Department hopes to strengthen the Zambian Seismic Network in the Country and for this reason it has procured three more Broadband seismic stations to revamp three other remote stations which were previously installed/ run by FINNIDA but due to some financial constraint the stations were run down and could not be maintained.

   

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 SEISMIC MONITORING IN ZAMBIA  Currently there are five seismic stations working in Zambia

though Government is in the process of installing the other two procured stations from Gulrap. These are Lusaka (LSZ) main which is being run in collaboration with United States Geological Surveys (USGS) and Comprehensive Nuclear Test Ban Treaty (CTBTO). The other three are Africa Array seismic stations namely Kitwe (KTWE), Itezhitezhi (TEZI) and Mongu(MONG). Petauke (PTZ) has just been reinstalled.

  

Map showing station Map showing station distributiondistribution

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Location and Instruments used in Location and Instruments used in StationsStations

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STATION CHARACTERISTICS

STATION

LUSAKA ISOKA MONGU MANSA KASEMPA PETAUKE ITEZHI- TEZHI

CODE

LSZ IKZ MONG MZZ KMZ PTZ ITZ

LATITUDE(S) 15.277 10.171 15.152 11.142 13.456 14.249 15.770

LONGTUDE (E)

28.188 32.646 23.090 28.876 25.834 31.339 26.036

ELEVATION (M)

1184 1350 1057 1256 1224 1027 1107

GEOLOGICAL FORMATION

GRANITE QUARTZITIC SANDSTONE

SANDSTONE META-VOCANICS

SANDSTONE META-GRANITE GRANITE

COMPONENT

TRI-AXIAL Z,N,E SP-Z,N,E SP-Z,N,E SP-Z,N,E

SEISMOMETER TYPE

STS-2 HIGH- GAIN

CMG-3ESP GURALP

CMG-3ESP GURALP

LE D3/IS CMG-3ESP GURALP

Ts (sec)

VBB VBB VBB VBB VBB VBB VBB

RECORDING TYPE

DIGITAL TELEMETRY

DIGITAL TELEMETRY

DIGITAL TELEMETRY

DIGITAL TELEMETRY

DIGITAL TELEMETRY

DIGITAL TELEMETRY

DIGITAL TELEMETRY

TIMING

GPS GPS GPS GPS GPS GPS GPS

POWER

SOLAR + AC SOLAR +AC SOLAR SOLAR + AC SOLAR + AC SOLAR + AC SOLAR + AC

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LUSAKA SEISMIC STATION IN KAPOPO VILLAGELUSAKA SEISMIC STATION IN KAPOPO VILLAGESEISMOMETER AND DATA ACQUISITION HOUSE WITH SEISMOMETER AND DATA ACQUISITION HOUSE WITH

SOLAR POWERSOLAR POWER

• Seismometer and recorder house

• Solar and ac powered• Security razor wire fence

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OVERVIEW OF KAPOPO SEISMIC STATIONOVERVIEW OF KAPOPO SEISMIC STATION

– Location of Antenna and equipment:

• Antenna Site• Indoor Equipment Location

– Cable Run, Grounding and Power– General Information

• Outdoor environment• Access to site• Housing facilities• Specialised equipment• Transportation to site• Communications• Personnel accommodation• Onsite facilities• Special permission to install

VSAT– Networking– Coordination issues

• Manned/unmanned station• Site preparation (civil works)• VSAT shipment

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Waveform from LSZ (AS119)Waveform from LSZ (AS119)

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ZAMBIA NDC (N192)ZAMBIA NDC (N192)• (1) Indoor equipment• (2) Data receiving

computer• (3) Data processing

computer

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2 3

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ZAMBIAN NDC (N192)ZAMBIAN NDC (N192)• (1) Geological Survey

Department hosts the Zambia NDC (N192)

• (2) Chemistry building atop which the VSAT is anchored

• (3) Geophysics and seismic building houses the Zambia NDC (N192)

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STATION PREPERATIONSTATION PREPERATION

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MONGU TEMPROL SEISMIC STATION DATA MONGU TEMPROL SEISMIC STATION DATA ACQUISITION AND DATA LOGER BEING ACQUISITION AND DATA LOGER BEING

TESTEDTESTED

• DATA ACQUISTION AND DATA LOGER BEING ASSEMBLED

• THE VAULT BEING DUG

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MONGU TEMPRAL STATIONMONGU TEMPRAL STATION• SENSOR ,BATTE

RIES,DATA LODGER AND POWER BOARD INSTALLED

• GURALP SENSOR

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LUSAKA SEISMIC STATION – LUSAKA SEISMIC STATION – AS119AS119

• Seismometer (s)• Concrete pier (p)• Quantera Data

Acquisition System (q-das)

• Accelerometer (a)• Insulation (i)• CTBTO (c)• USGS (u)• Monitor (m)

s

p i

a

q-das

m cu

Benefits• Zambia through these stations have been able to

get data for use to end users• Through cooperating partners some members of

staff has been trained up to Msc level• Technical staff at NDC have been attending

training Courses coupled with introductory workshops and seminars

• Acquisition of application software's (in a Box) Dimas and Seisan for analysis

• Accessing data for the end users has been made possible

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The EndThe End

Thank You