Seismic Monitoring of the Northeastern Caribbean Region

Christa G. von Hillebrandt-Andrade, Víctor Huérfano and Juan LugoPuerto Rico Seismic Network, Dept. Geology, UPR-Mayagüez

christa@midas.uprm.edu

José Martínez Cruzado, John Clinton and Georgia CuaPuerto Rico Strong Motion Program, Dept. of Civil and Surveying Engineering,

UPR-Mayagüezmartinez@uprm.edu

The seismicity of the northeastern Caribbean region is monitored jointly by the Puerto Rico Seismic Network (PRSN) and the Puerto Rico Strong Motion Program

(PRSMP) of the University of Puerto Rico at Mayagüez.

From ten Brink, 2004

Objectives and Goals

The objectives of the two networks are to record, process, analyze, and

research local, regional and teleseismic earthquakes. The ultimate goals are to produce high quality data and information in order to be able to respond to the needs of emergency

management and the industrial, academic and research communities,

as well as the general public.

PRSN

• Operation of a real time network of almost 25 short period, broad band and joint strong motion stations.

• Monthly seismicity reports issued locally• Felt earthquake memos• Web site• Education and Outreach program• Puerto Rico and Virgin Islands Tsunami Warning

System• Host to MIDAS• Seismological research

Puerto Rico Seismic Network2005

Seismic Stations

After the Tropical Storm Jeanne

W-lpRing

Wave Ring

PRSN-SP

PRSN-BB

II/IU/R

inputRing

Alarm Ring

DANIS

5

6

1

2

4

14

PickRing

Hypo Ring

RMTPRSM-SM

3

9

8

1613

12

17

15

7

18

11

10

PRSN EarthWormData Flow

Local and Virtual Seismic Stations Monitored by PRSN

IRIS/USGS IU Network

IRIS/IDA II Network

ISU/USAD Network

PRSN/UPR Network

Local and Virtual Seismic Stations Monitored by PRSN with USGS Stations

IRIS/USGS IU Network

IRIS/IDA II Network

ISU/USAD Network

PRSN/UPR Network

Puerto Rico Seismic NetworkIRIS

Located vs Felt Earthquakes in the Located vs Felt Earthquakes in the Northeastern CaribbeanNortheastern Caribbean

2004-20052004-2005

http://redsismica.uprm.edu

Tsunamis Scenarios for Puerto Rico

RegionalTsunami

≤ 2HLOCAL

Tsunami

DISTANT TSUNAMI> 2H

Protocolo de Tsunamis paraPuerto Rico e Islas Vírgenes

Proposed Tide Gauge Network

New NOS PRSN Upgrade NOS New NOS/BVI

Approximate Locations DART Buoys as of July, 2005

Host to MIDAS (MIDdle America Seismograph Consortium)

Promote scientific interaction among participating institutions and to facilitate the rapid, efficient and widespread utilization of earthquake data in routine observations and in more advanced seismological research

Opportunities forResearch and Operations

• Caribbean Velocity model

• RMT• SKS Splitting• Regional Tomography• Seismic Hazard• Attenuation

• Quick EQ location• Magnitude

computation• Distribution• Alarms• Real time sharing