JAMAICA SEISMOGRAPH NETWORK
IRIS Metadata Workshop
Managing Waveform Data and Related
Metadata for Seismic Networks
Foz do Iguacu, Brazil
August 13 -19, 2010
Presenter: Paul Williams
Earthquake 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
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
March 1,1668
VII
Port Royal
June 7, 1692
X
Port Royal, Kingston, 2000 dead; buildings
Vere Plains, Also felt collapsed, liquefaction,
island-wide
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, Some houses fell, loud
St. Catherine
noise accompanied
shock
Landslide
Houses and Ships
damage
MOST DAMAGING EARTHQUAKES IN
JAMAICA
DATE
MAXIMUM
INTENSITY
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 islandwide
4 dead, landslide and
bridge damage, utility
poles and lines damage
January 13, 1993
VII
Kingston, felt island-
2 dead, few case of
1692 (June 7) Port Royal M?
1907 (Jan 14) Kingston Ms 6.5
PAW-IRIS_July 2010
MOST ACTIVE BLOCK
MARCH 2009 – APRIL 2010
Blue Mountain being the most
active block
JSN Local sub-region blocks
-78.5š
-77.5š
-78š
2
1
18.5š
-76.5š
-77š
3
-76š
4
Montego B ay
18.5š
5
Oc h o Ri o s
MB J
BBJ
8
6
Ne g ri l
CV J
7
B NJ
9
Po rt An to n i o
11
13
16
14
Fault
18
19
MCJ
20
21
22
18š
23
Y HJ
K ingston
24
JSN Station
CMJ
GW J
H OJ
Bl a c k Ri v e r
17
S TH
15
M andev ille
18š
12
10
NE J
25
26
P CJ
Accelerograph
-78.5š
-78š
-77.5š
-77š
-76.5š
-76š
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 16channel digitizer and a GOES satellite clock.
History of Earthquake monitoring
and the JSN in Jamaica
• 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
MISSION STATEMENT
Through 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.
June 20, 2010
PW/EQU/UWI-Mona
13
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 Secretary
Plus
One 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
SEISMIC MONITORING IN JAMAICA 1997-2010
JSN (Z)(8)
JSN (3C)(4)
JSMN (8)
GPS (36)
Pedro/NE Cay
Morant/Middle 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.
JAMAICA TELEMETRY SEISMIC
NETWORK
REMOTE
STATION
UHF
REPEATER
VHF
CENTRAL
RECORDING
STATION
REMOTE
STATION
UHF LINK
RADIO
LINKS
RANGE
FROM
15KM TO
60KM
THE JAMAICA SEISMOGRAPH NETWORK
TELEMETRY LINK
June 20, 2010
PAW/EQU/UWI-Mona
20
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.
Jamaica Telemetry Seismic
Antenna
Network
L4C
SEISMOMETER
AMPLIFIER
FILTER & VCO
UHF
TRANSMITTER
GPS
ANTENNA
RECEIVER
DISCRIMINATOR
ANALOG
DRUM
RECORDER
16 BIT
SARA
DIGITIZER
16 BIT NATIONAL
INSTRUMENTS &
MULTIPLEXER
SEISLOG
&
SEISAN
WINDOWS
PC(SDA) &
PC(SDP)
Jamaica Seismograph Network Stations
ID Code
Station Name
Lattitude
Longitude
Elevation
Site Condition
BBJ
Bamboo, St. Ann 18.3865N
77.2623W
766m, isolated pier on
limestone bedrock
BNJ
Bonny Gate, St.
Mary
18.3210N
76.9505W
485m, concrete slab on
limestone bedrock
CMJ
Castle Mountain, 18.1351N
Portland
76.3613W
391m, concrete slab on
limestone bedrock
GWJ
Greenwich, St.
Andrew
18.0740N
76.7280
W
1170m,concrete slab
on weathered soil
HOJ
Hope (Mona), St. 18.0050N
Andrew
76.7490W
228m, Quaternary
alluvium of
unknown depth
MBJ
Montego Bay, St. James
18.4050N
77.8630W
513m, Concrete
slab on limestone
bedrock
MCJ
Munroe College, St.
Elizabeth
17.9253N
77.8630W
661m, Isolated
pier on limestone
bedrock
PCJ
Portland Cottage,
Clarendon
17.9253N
77.1570W
198m, isolated
pier on limestone
bedrock
RHJ
(COJ)
Red Hills, St. Andrew
(Cooper’s Hill)
18.7410N
76.8540W
779m, no sensor
STH
Stony Hill, St. Andrew
18.0770N
76.8097N
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
17.8920N
76.4930W
600m, isolated
pier on limestone
bedrock
Current State of Network
Station
Owner of
Site
Sensor
Site Condition
Stony Hill
(STH)
UWI
3 component L4-C
Etna 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 Government
(CMJ)
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-C
Guralp 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 accelerograph
Garulp 3ESPD and SAM
Vault
Pike (CRJ)
Civil Aviation
Single component L4-C
Vault to be
constructed
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
GPS Monuments across Jamaica
June 15, 2004
The Earthquake Unit, UWI - Mona, Kingston
7, Jamaica
36
GPS MONITORING IN JAMAICA
GPS 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 Station
ETNA installed on a pier in a
free field installation
K2 installed
SUMMARY
• The Jamaica Seismograph consist of 12 short
period seismograph station – four 3component station and eight singlecomponent 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.
THE END
PAW-IRIS_July 2010