T3.1-P17 Network Monitoring Seismic and Volcanic OVSICORI-UNA COSTA RICA 1 H . Villalobos

1Volcanological and Seismological Observatory of Costa Rica ( OVSICORI) National University of Costa Rica.

Email : hvillal@una.ac.cr

Fig 17. National Data Centre CTBTO – OVSICORI/UNA.

The data from International Data Centre – CTBTO is forwarding in Continuous Data Format ( CD1.1 ) to NDC in OVSICORI-UNA . Our systems acquisition of seismic data ( Antelope , Earthworm ,SeiscomP3) receive data from international stations around the world to get a better location for local and regional seismic events.

SUMMARYThe Volcanological and Seismological Observatory of Costa Rica, National University (OVSICORI-UNA) is a University Research Institute dedicated to research of volcanoes, earthquakes and other tectonic processes, in order to find useful applications that help society to mitigate the adverse effects of these events to economic and social development.In 1984, the OVSICORI-UNA initiates the operation of a seismographic and volcanic network designed to monitor seismic and volcanic activity throughout the national territory. Currently the seismographic and volcanic network has a registration system analog and digital. The latter enables online analysis of seismic and volcanic signals digitally, allowing to expedite the analysis of signals and their interpretation using modern computerized methods.

In the Figure 2 .Blue star represent 7.6 magnitude earthquake September 05th , 2012 and the brown star represent 6.6 magnitude earthquake October 23th , 2012 .

The seismic network consists of instruments short period and broadband, around 34 stations broadband with digitizers Type: Kinemetrics (Q330, Q330HR, Q330HRS), Nanometrics (TAURUS), REFTEK 130, Güralp (EAM- CMG6TD) ; broadband seismometers Type: CMG ( Güralp 6T - 3ESPC), Streckeisen (STS1-STS2) , Nanometrics (Trillium240 - Compact) ; accelerometers Type : Kinemetrics FBA-EST and REFTEK SMA-120. The analog seismic network short period is about 6 stations with seismometers Type : Ranger SS1 and one digitizer card in the center of seismic record. At present , there is a renewed the analogue network by a digital broadband network in more than 95%,.The broadband network consists of strong motion and weak motion and monitoring by permanent GPS stations.

Each station broadband also has a permanent GPS station, part of the seismic monitoring network has around 25 permanent GPS stations Type: Trimple NetRS, NETR9 with Zephir and Choke Ring antennas.

SEISMIC NEAR-REAL TIME MONITORING

VOLCANIC NEAR-REAL TIME MONITORING,

Volcanic seismology is performed through 15 broadband seismic stations located in the five active volcanoes in Costa Rica.Figure 4. Left represent number of daily volcanic earthquakes recorded between June and November , 2014 and right represent number of volcanic-tectonic earthquakes associated with Turrialba Volcano between June 01th and November 01th , 2014.

Location Station Lat Lon Datalogger Sismometer Type link

NEAR - REAL TIME Volcan Arenal VAVL 10.437 -84.7091TAURUS TRILLIUM COMPACT 3G-ICE

Volcan Miravalles VMAR 10.813 -85.1205Q330HRS TRILLIUM 240 3G-ICE

Volcan Turrialba – Crater Norte VTUN 10.023 -83.7635TAURUS TRILLIUM COMPACT LAN-WIFI-OVSI

Volcan Turrialba – Crater Este VTCE 10.025 -83.7568TAURUS TRILLIUM COMPACT LAN-WIFI-OVSI

Volcan Turrialba – Casa Guarda VTCG 10.015 -83.7586TAURUS TRILLIUM COMPACT LAN-WIFI-OVSI

Volcan Turrialba – Crater Central VTUC 10.024 -83.762TAURUS TRILLIUM COMPACT LAN-WIFI-OVSI

Volcan Turrialba – Calle Vargas VTCV 9.9831 -83.7267CMG – DM24S3EAM 3ESPC 3G-ICE

Volcan Turrialba - Hacienda Retiro VTRT 10.002 -83.7945TAURUS TRILLIUM COMPACT 3G-ICE

Volcan Irazu Hacienda Retes VIRE 9.9668 -83.8975TAURUS TRILLIUM COMPACT LAN-WIFI-OVSI

Volcan Irazu VICA 9.9845 -83.8446CMG – DM24S3EAM 3ESPC LAN-WIFI-OVSI

Volcan Irazu HAYA 9.9801 -83.8428Webtronics – 16 bits Ranger – SS1 PTP-UHF-VHF

Volcan Poas - Crater CRPO 10.195 -84.2261TAURUS TRILLIUM COMPACT LAN-WIFI-OVSI

Volcan Poas – Terranova VPTE 10.172 -84.1985CMG – DM24S3EAM 3ESPC 3G-ICE

Volcan Poas – Von Franzius VPVF 10.205 -84.2297CMG – DM24S3EAM 3ESPC LAN-WIFI-OVSI

Volcan Rincon de la Vieja VRLE 10.788 -85.3652CMG – DM24S3EAM 3ESPC 3G-ICE

Volcan Turrialba – Tiendilla VTLA 10.002 -83.7753CMG – DM24S3EAM 3ESPC 3G-ICE

Gas monitoring of SO2 in Turrialba Volcano in near – real time , data sending with 3G cellular network. 2 Stations Type Minidoas with Ocean Optics Spectrometer and software acquisition system NOVAC.

Volcanic Video Surveillance in Active Volcanoes Costa Rica

The installation webcams in active volcanoes , we can observe in real time eruptions of ash and ballistic . The web cam in our volcanoes use technology light finder that reproduce images with level of light of 0.8 lux.

GPS Permanent Network in near-real time

Figure 1. Map Seismic Network. Figure 2. Seismicity September to - October , 2012.

Table 1. Station Volcanoes. Figure 3. Map of volcanic seismic stations

Figure 4. Turrialba volcano seismicity October 29th , 2014 .

Figure 5 .Flow SO2 from January to November 2014 .

Figure 6 . Novac Software

Figure 7. Picada Station

Remote Monitoring of Volcanic Gases

Figure 8. Eruption Poas Volcano February 25th , 2014

Figure 9. Eruption Turrialba Volcano view from Irazu Volcano May 04th , 2015

Figure 10. Eruption Turrialba Volcano May 04th , 2015

Figure 11. Network GPS

Figure 12. Station VTTL

10 stations Trimble receiver NETRS – NETR9 and Zephir Antenna . During the eruption of October 29th , 2014 . Figure 10 . Show the sites VTQU – VTNA – VTGP – VTCI and two references sites ( AACR – CRCP ) they were used to reduce displacement by tectonic movements. The results show a rise of up to 1 cm in VTQU and VTPG points. In VTCI , VTNA and GIBE , the vertical movement is not significant . In the horizontal and only VTCI and VTQU show significant movement to the southwest , about 1 cm.

DATA ACQUISITION AND COMMUNICATION SYSTEMS,

Figure 14.SeiscomP3 Automatic event detection , location

Figure 13.Antelope Nicoya Earthquake September 05th , 2012

In the part of acquisition server , we are using the Virtualization Technology with VMWARE and NetApp data storage system. . High availability is possible with a redundant server arquitecture in Data Center UNA and Data Center OVSICORI. In this systems some benefits fault tolerant , data recovery and down time about 5 s . Two data centers have a expanded storage capacity to 100 TeraBytes each side.

The OVSICORI-UNA network of data communications has been implemented a wireless broadband network a free frequency 2.4GHz and 5.8 GHz with low cost equipment and high rate of bandwidth ( 40 Mbps ) in Turrialba , Irazu and Poas volcanoes. In the last years we have implemented the use of 3G cellular networks to send data of from all monitoring systems.

Figure 15.Virtualization Arquitecture

Figure 16.Data Communications Network OVSICORI

OVSICORI-UNA uses a main adquisition seismic data and post-procesing analysis Antelope real time system. SeiscomP3 is used for automatic location and sending SMS messages and alerts using social networks ( Facebook , Twitter , Web OVSICORI).