Duration Exceedance - Tsunami Warning

In this page we report the results of the Duration-Exceedance (D-E) calculation proposed by Anthony Lomax and Alberto Michelini (Lomax and Michelini, 2009b, see example).
The procedure is designed to capture the duration of the P-wave high frequency motion that has been found (Lomax and Michelini, 2009a) to be a good indicator of tsunami likelihood. In particular, the analysis of a set of earthquakes during the past 20 years has shown that durations longer than 50 s are generally associated to earthquakes producing tsunamis.

References:
- Lomax, A., and Michelini, A. (2009a). Mwpd : a duration–amplitude procedure for rapid determination of earthquake magnitude and tsunamigenic potential from P waveforms, Geophys. J. Int. 176, 200–214, doi: 10.1111/j.1365-246X.2008.03974.x
- Lomax, A., and Michelini, A. (2009b). Tsunami early warning using earthquake rupture duration, Geophys. Res. Lett. 36, L09306, doi:10.1029/2009GL037223,

Real Time

The link to the Real Time provides a quasi real-time calculation of the D-E.

Past events

The Past Events links to movies obtained from the real time analysis of some larger and significant earthquakes.

  • 2011-06-13 "South Island, New Zealand": Movie - PDFs
  • 2011-03-11 "Near east coast of eastern Honshu, Japan": Movie - PDFs
  • 2011-03-09 "New Britain, Papua New Guinea, region": Movie - PDFs
  • 2011-03-09 "Near east coast of eastern Honshu, Japan": Movie - PDFs
  • 2011-02-11 "Chile": Movie - PDFs
  • 2010-10-25 "Southern Sumatera, Indonesia": Movie - PDFs
  • 2010-09-03 "South Island, New Zealand": Movie - PDFs
  • 2010-08-22 "Ionian Sea": Movie - PDFs
  • 2010-06-12 "Nicobar Islands, India, region.": Movie - PDFs
  • 2010-05-27 "Vanuatu Islands": Movie - PDFs
  • 2010-05-09 "Northern Sumatera, Indonesia": Movie - PDFs
  • 2010-04-26 "Southeast of Taiwan": Movie - PDFs
  • 2010-04-13 "Qinghai, China": Movie - PDFs
  • 2010-04-11 "Spain": Movie - PDFs
  • 2010-03-14 "Near east coast of eastern Honshu, Japan": Movie - PDFs
  • 2010-02-27 "Near coast of central Chile": Movie - PDFs
  • 2010-02-18 "Priamurye-Northeastern China border region": Movie - PDFs
  • 2010-01-12 "Haiti": Movie - PDFs
  • 2009-11-11 "Ionian Sea": Movie - PDFs
  • 2009-11-03 "Ionian Sea": Movie - PDFs
  • 2009-10-24 "Banda Sea": Movie - PDFs
  • 2009-10-08 "Vanuatu Islands": Movie - PDFs
  • 2009-10-08 "Santa Cruz Islands": Movie - PDFs
  • 2009-10-07 "Vanuatu Islands": Movie - PDFs
  • 2009-09-30 "Sumatra, Indonesia": Movie - PDFs
  • 2009-09-29 "Samoa Islands region": Movie - PDFs

More earthquake info, here