JAMAICA SEISMOGRAPH NETWORK

IRIS Metadata Workshop

Managing Waveform Data and Related Metadata for Seismic Networks

Foz do Iguacu, BrazilAugust 13 -19, 2010

Presenter: Paul WilliamsEarthquake Unit

Jamaica

FACTS ABOUT JAMAICA• Location = 18 N, 76-78 W ~400Km E of Grand Cayman and

150km S of SE Cuba.• Spanish Colony: 1494 -1655• British Colony : 1655-1962• Got independence from Britain in 1962• Area = 11424 km sq.• Length of island east to west 243 km Width of maximum

distance N- S 80 km• Mountainous with highest mountain of 2000m in the east.• Population of 2.8 million.• Experience moderate to high seismicity.

LOCATION OF JAMAICA

HISTORY OF EARTHQUAKES IN JAMAICA

HISTORY OF EARTHQUAKES IN JAMAICA

Eastern Jamaica• 1692 (X)• 1771 (VII)• 1907 (IX)• 1914 (VII)• 1993 (VII)

Western Jamaica• 1839 (VII)• 1943 (VII)• 1957 (VIII)

MOST DAMAGING EARTHQUAKES IN JAMAICA

DATE MAXIMUM INTENSITY

PLACE AFFECTED OBSERVED DAMAGE

1667 VIII Landslide

March 1,1668 VII Port Royal Houses and Ships damage

June 7, 1692 X Port Royal, Kingston, Vere Plains, Also felt island-wide

2000 dead; buildings collapsed, liquefaction, subsidence, landslide and water ejected

September 3, 1771 VII Port Royal, Kingston Damaged to structures , felt on boats in port.

November 11, 1812 VIII Kingston Several peopled killed; wall fell, buildings damaged

April 10, 1824 VII Kingston, Clarendon, St. Catherine

Some houses fell, loud noise accompanied shock

DATE MAXIMUMINTENSITY

PLACE AFFECTED OBSERVED DAMAGE

November 5, 1839 VII Montego Bay, St. James

Government buildings declared unsafe due to damaged

June 14, 1907 IX Kingston, Port Royal 1000 dead, fire burnt city, most buildings collapsed, water main broke, landslides and slumps, localized tsnunami

August 3, 1914 VII Eastern Jamaica Buildings damaged

July 15,1943 VII St. Elizabeth

March 1, 1957 VIII Montego Bay, St. James and felt island-wide

4 dead, landslide and bridge damage, utility poles and lines damage

January 13, 1993 VII Kingston, felt island-wide

2 dead, few case of damage to buildings

MOST DAMAGING EARTHQUAKES IN JAMAICA

PAW-IRIS_July 2010

1692 (June 7) Port Royal M? 1907 (Jan 14) Kingston Ms 6.5

MOST ACTIVE BLOCK MARCH 2009 – APRIL 2010

JSN Local sub-region blocks Blue Mountain being the most active block

-78.5š

-78.5š

-78š

-78š

-77.5š

-77.5š

-77š

-77š

-76.5š

-76.5š

-76š

-76š

18š 18š

18.5š 18.5š

BBJ

BNJ

CMJGWJ

HOJ

NEJ

MBJ

MCJ

PCJ

STH

YHJ

CVJNegril

Montego Bay

Ocho Rios

Port Antonio

Mandeville

Kingston

Black River

12 3 4

5

67

89

1011

12

13

1415

16

17 18 19 20 21 2223

24 25 26Fault

JSN Station

Accelerograph

History of Earthquake monitoring and the JSN in Jamaica

The first modern seismograph in Jamaica was installed in the early 1960s at the Geological Survey Division.

In 1963 the station was moved to the Mona campus of the University of the West Indies from where the growth of the Jamaica Seismograph Network began.

In April 1990 digital recording and data processing were introduced at the Central Recording Station (CRS) using the Soufriere software of Beckles and Shepherd (1984). The system required two PC-Ats, 12-bit 16-channel digitizer and a GOES satellite clock.

• In 1997 the Earthquake Unit started using a software called PC-Seismic Data Acquisition (PC-SDA)(developed by Avirac and Shapira) and PC-Seismic Data Processing (PC-SDP) (Malisky and Shapira). PC-SDA uses a 16 bit digitizer with Trimble GPS for timing.

• In 2006 the EQU started using seislog and seisan with a 16 bit SARA digitizer.

• We should start using Earthworm before the end of 2010.

History of Earthquake monitoring and the JSN in Jamaica

June 20, 2010 PW/EQU/UWI-Mona 13

MISSION STATEMENTThrough operating the Jamaica Seismograph Network and affiliating with other Caribbean and Regional Networks

the Earthquake Unit seeks to understand earthquake processes in and around Jamaica and advise the society about earthquake hazard

thereby encouraging community awareness and the application of mitigative strategies to development.

STAFF AT THE EARTHQUAKE UNIT

6 full-time staff:• Research Fellow/Geophysicists • Network Engineer/Manager• Seismic Analyst• Information/Electronics Technologist• Scientific Officer – Education & Information• Administrative SecretaryPlusOne Postgraduate student and two part-time staff

The Earthquake Unit

• The Unit operates the Jamaica Seismograph Network, Jamaica Strong Motion Network and the GPS Monitoring Network.

• Archives and records all earthquake related data for Jamaica.

• Conducts relative research on Jamaica seismicity and tectonics.

• Performs national and site specific seismic hazard assessment for national and private entities.

Earthquake Unit contd.

Informs the public about felt earthquake• Operates the National Data Centre (NDC)

for Jamaica in keeping with the CTBTO• Hosts tours by schools and other

community groups at the Central Recording Station

JSN (Z)(8)JSN (3C)(4)

JSMN (8)GPS (36)

SEISMIC MONITORING IN JAMAICA 1997-2010

Morant/Middle CayPedro/NE Cay

JAMAICA SEISMOGRAPH NETWORK

• The Jamaica Seismic Network consists of 12 analog short period stations.

• There are four 3-component and 8 single vertical component station

• The JSN is a telemetry network using UHF and VHF radios.

• The station are mostly powered by solar power.

REPEATER

REMOTE STATION

UHFREMOTE STATIO

N

CENTRAL RECORDING STATION

UHF LINK

VHF

JAMAICA TELEMETRY SEISMIC NETWORK

RADIO LINKS

RANGE FROM

15KM TO 60KM

June 20, 2010 PAW/EQU/UWI-Mona 20

THE JAMAICA SEISMOGRAPH NETWORK TELEMETRY LINK

Telemetry Link

• The stations are located across the island and data from these stations is transmitted to the CRS using UHF and VHF radios.

• The central recording station (CRS) is located at the University of the West Indies, Mona Campus in Kingston (HOJ on the Map).

• Short links are used for radio links because of:– the terrain the links are repeated several times

before reaching the CRS.– Using smaller RF power to minimize the power

requirement so that solar power can be used.

L4CSEISMOMETER

Antenna

UHFTRANSMITTER

AMPLIFIER FILTER & VCO

ANTENNA

RECEIVER DISCRIMINATOR16 BIT SARA

DIGITIZER

16 BIT NATIONAL INSTRUMENTS &

MULTIPLEXER

SEISLOG &

SEISAN

WINDOWSPC(SDA) &

PC(SDP)

ANALOG DRUM

RECORDER

GPS

Jamaica Telemetry Seismic Network

ID Code Station Name LattitudeLongitude

ElevationSite Condition

BBJ Bamboo, St. Ann 18.3865N77.2623W

766m, isolated pier on limestone bedrock

BNJ Bonny Gate, St. Mary

18.3210N76.9505W

485m, concrete slab on limestone bedrock

CMJ Castle Mountain, Portland

18.1351N76.3613W

391m, concrete slab on limestone bedrock

GWJ Greenwich, St. Andrew

18.0740N

76.7280W

1170m,concrete slab on weathered soil

HOJ Hope (Mona), St. Andrew

18.0050N76.7490W

228m, Quaternary alluvium of unknown depth

Jamaica Seismograph Network Stations

MBJ Montego Bay, St. James 18.4050N77.8630W

513m, Concrete slab on limestone bedrock

MCJ Munroe College, St. Elizabeth

17.9253N77.8630W

661m, Isolated pier on limestone bedrock

PCJ Portland Cottage, Clarendon

17.9253N77.1570W

198m, isolated pier on limestone bedrock

RHJ(COJ)

Red Hills, St. Andrew(Cooper’s Hill)

18.7410N76.8540W

779m, no sensor

STH Stony Hill, St. Andrew 18.0770N76.8097N

504m, isolated pier on limestonebedrock

CVJ Pike (Coleyville) , Manchester

18.226N

77.535

969 m, concrete slab on limestone bedrock

YHJ Yallahs Hill, St. Thomas 17.8920N76.4930W

600m, isolated pier on limestone bedrock

Station Owner of Site

Sensor Site Condition

Stony Hill (STH)

UWI 3 component L4-CEtna accelerograph(Broadband Garulp

CMG-3ESPD and SAM)

Pier

Greenwich (GWJ)

Private Owner

Single component L4-C Vault to be constructed

Yallahs (YHJ) Government Single component Pier

Castle Mountain (CMJ)

Government Mark Product L4-C Pier to be constructed

Bonny Gate (BNJ)

Govermnent Mark Product L4-C(Garulp 3ESPD and

SAM)

Vault

Bamboo (BBJ) Government Mark Product L4-C single component

Pier

Current State of Network

Portland Cottage (PCJ)

Port Authority 3 component Mark product L4-C

Pier

Munro College School 3 component L4-CGuralp CMG ESPD and

SAM

Pier

Negril (NEJ) Private Single component L4-C Vault or pier to be constructed

Montego Bay (MBJ)

Aeronautical Communication

Leased from Government

3 component Mark product L4-C

Etna accelerographGarulp 3ESPD and SAM

Vault

Pike (CRJ) Civil Aviation Single component L4-C Vault to be constructed

Current State of Network

Seismometers in use at the JSN

Mark Product L-4C Guralp CMG 40T Guralp CMG-6TD

Earthquake recorded near the center of the Island

REMOTE SEISMIC STATION AT NEGRIL (NEJ) and YALLAHS (YHJ)

Three Component Station at Munro College (MCJ)

Earthquake Unit, UWI

Seismic Station at Greenwich (GWJ)

Remote seismic station Station powered by solar

CENTRAL RECORDING STATION

Equipment at Central Recording Station

Solar panels at the CRS Charge Controller and Inverter at CRS

SOFTWARE USED FOR DATA ACQUISITION AND ANALYSIS

For data acquisition• Seislog • PC-Seismic Data Acquisition (PC-SDA)

For processing or data analysis• Seisan• PC-Seismic Data Processing (PC-SDP)

GPS MONITORING

June 15, 2004 The Earthquake Unit, UWI - Mona, Kingston 7, Jamaica 36

GPS Monuments across Jamaica

GPS MONITORING IN JAMAICAGPS Monitoring on Morant Cays offshore GPS installed in Geodetic Monument

GPS Monitoring Station

Portable GPS Station Fixed GPS Station

USGS-GSN Station Mount Denham Jamaica (MTDJ)

Equipment at station Conducting test at station

USGS-GSN MTDJ STATION

Comprehensive (Nuclear) Test Ban Treaty Organisation

(CTBTO)

Jamaica’s National Data Centre (NDC)

Earthquake Unit, UWI

CTBTO National Data Center

VSAT for Jamaica NDC NDC Equipment

Accelerograph StationETNA installed on a pier in a free field installation

K2 installed

SUMMARY

• The Jamaica Seismograph consist of 12 short period seismograph station – four 3-component station and eight single-component station.

• The Jamaica Strong Motion Network consist of 8 accelerograph (6 Etnas, 1 CMG 5TD and one K2). There are three other etnas owned by the other institutions that are operated by the Earthquake Unit. And 2 REFTEK accelerograph will be installed at the NMIA airport

•

SUMMARY CONTINUE

• GPS network has 36 monitoring points three of which have a fixed GPS installation

• To improve our network we hope to upgrade our network to digital.

• Install 6 broadband seismometers• Have automatic solution of earthquakes.• Have real time access to accelerograph to

produce shake map.

PAW-IRIS_July 2010

THE END