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Usage of an early warning and information system Web-site for real-time seismicity in Iceland

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  • Deanne Bird
  • Matthew Roberts
  • Dale Dominey-Howes

Abstract

Iceland has been subjected to destructive earthquakes and volcanic eruptions throughout history. Such events are often preceded by changes in earthquake activity over varying timescales. Although most seismicity is confined to micro-earthquakes, large earthquakes have occurred within populated regions. Following the most recent hazardous earthquakes in 2000, the Icelandic Meteorological Office (IMO) developed an early warning and information system (EWIS) Web-site for viewing near-real-time seismicity in Iceland. Here we assess Web-site usage data in relation to earthquake activity, as recorded by the South Iceland Lowland (SIL) seismic network. Between March 2005 and May 2006 the SIL seismic network recorded 12,583 earthquakes. During this period, the EWIS Web-site logged a daily median of 91 visits. The largest onshore event (M L 4.2) struck 20 km from Reykjavík on 06 March 2006 and was followed by an immediate, upsurge in usage resulting in a total of 1,173 unique visits to the Web-site. The greatest cluster of large (≥M L 3) events occurred 300 km offshore from Reykjavík in May 2005. Within this swarm, 9 earthquakes ≥M L 3 were detected on 11 May 2005, resulting in the release of a media bulletin by IMO. During the swarm, and following the media bulletin, the EWIS Web-site logged 1,234 unique visits gradually throughout the day. In summary, the data reveal a spatial and temporal relationship between Web-site usage and earthquake activity. The EWIS Web-site is accessed immediately after the occurrence of a local earthquake, whereas distant, unfelt earthquakes generate gradual interest prompted by media bulletins and, possibly, other contributing factors. We conclude that the Internet is a useful tool for displaying seismic information in near-real-time, which has the capacity to help increase public awareness of natural hazards. Copyright Springer Science+Business Media B.V. 2008

Suggested Citation

  • Deanne Bird & Matthew Roberts & Dale Dominey-Howes, 2008. "Usage of an early warning and information system Web-site for real-time seismicity in Iceland," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 47(1), pages 75-94, October.
    • Handle: RePEc:spr:nathaz:v:47:y:2008:i:1:p:75-94
    DOI: 10.1007/s11069-007-9198-y
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    References listed on IDEAS

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    1. Paula Dunbar, 2007. "Increasing public awareness of natural hazards via the Internet," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 42(3), pages 529-536, September.
    2. Elfreda A. Chatman, 1986. "Diffusion theory: A review and test of a conceptual model in information diffusion," Journal of the American Society for Information Science, Association for Information Science & Technology, vol. 37(6), pages 377-386, November.
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    Cited by:

    1. Ming-Kuan Tsai & Nie-Jia Yau, 2013. "Improving information access for emergency response in disasters," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 66(2), pages 343-354, March.

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