An overview of Uganda Seismological Network and current activities Joseph Nyago Seismological Network Department of Geological Survey and Mines, P.O Box 9, Entebbe - Uganda IRIS Workshop on Managing Waveform Data and Related Metadata for Seismic Networks’, November 8-16, 2009 in Helwan - Cairo, Egypt

Outline Introduction History of destructive earthquakes in Uganda Earthquake epicenters 1900-2007 Station coverage Seismic instrumentation Data collection, analysis and interpretation Way forward Acknowledgements IRIS Workshop, Cairo-Egypt Wednesday, April 26, 2017

Introduction Seismological monitoring activities in Uganda as early as 1925 with a Milne- Shaw seismograph station at Entebbe. It was later re-established in 1989 under Uganda National Seismological Network. UNESCO donated 3 micro-earthquake (MEQ-800) analogue seismograph and short period seismometers. In 1999, the US Government through University of California San Diego (IRIS- IDA Project) installed a Global Seismographic station (MBAR) at Kyahi-Mbarara. In 1999, International Programs in Physical Sciences (IPPS), Sweden donated 3 Orion Nanometrics seismographs and broadband seismometers. IRIS Workshop, Cairo-Egypt Wednesday, April 26, 2017

History of destructive earthquakes in Uganda 9th July 1912: Kitgum earthquake, magnitude 6.7; 2nd October 1929: Toro earthquake in western rift, magnitude 5.9; 18th March 1945: Sembabule earthquake, magnitude 6.0; 20th March 1966: Toro earthquake, magnitude 6.6; 7th September 1990: Lake Victoria earthquake, magnitude 5.0; 9th October 1991: Butiaba Port earthquake, magnitude 5.3; 5th February 1994: Kisomoro earthquake, magnitude 6.2 (8 people lost lives, caused destruction of property in 3 western districts worth 61 million US dollars). IRIS Workshop, Cairo-Egypt Wednesday, April 26, 2017

Earthquake epicenters 1900-2007 IRIS Workshop, Cairo-Egypt VSAT antenna at site NDC-N180 Wednesday, April 26, 2017

Seismic Network VSAT antenna at site NDC-N180 IRIS Workshop, Cairo-Egypt VSAT antenna at site NDC-N180 Wednesday, April 26, 2017

Seismic Instrumentation Station (name/code) Equipment installed Data collection/availability Mbarara, MBAR CTBTO-IMS (AS103) 3-Component BB sensor, 3-Strong Motion sensor, Accelerometers VSAT terminal , USB Memory, AutoDRM. Entebbe, ENTT Short Period (vertical) sensors, MEQ-800 Sprengnether seismograph. 3 Component BB (CMG-40T) sensor, Orion digital Nanometrics (portable) seismographs Paper seismogram and phase reading and picking. Data disc (2GB) and manual download to PC Hoima, HOI Kilembe, KIL Data disc (2GB) and manual download to PC. IRIS Workshop, Cairo-Egypt Wednesday, April 26, 2017

Seismic Instrumentation IRIS Workshop, Cairo-Egypt VSAT antenna at site NDC-N180 Wednesday, April 26, 2017

Seismic Instrumentation IRIS Workshop, Cairo-Egypt Wednesday, April 26, 2017

Data collection, analysis and interpretation Seisan earthquake analysis software ( both linux and windows versions) is used to analyze waveform data from the IRIS station (MBAR) and waveform data from 3-component broadband (nanometrics) stations (ENT, HOI, KIL). IRIS Workshop, Cairo-Egypt Wednesday, April 26, 2017

Way forward ?? Upgrading the existing stations with improved event detection capability and modern instrumentation to ensure; Real-time waveform data transmission and availability Automatic waveform processing Automatic event location Expanding on the existing network by increasing on the number of stations to ten (10) to ensure accurate event location. IRIS Workshop, Cairo-Egypt Wednesday, April 26, 2017

Incorporated Research Institutions in Seismology (IRRS) Acknowledgements UNESCO Incorporated Research Institutions in Seismology (IRRS) University of California San Diego (UCSD) International Programs in Physical Sciences (IPPS) AfricaArray (AA) IRIS Workshop, Cairo-Egypt Wednesday, April 26, 2017

I Thank You All For Your Attention! End I Thank You All For Your Attention! IRIS Workshop, Cairo-Egypt Wednesday, April 26, 2017