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Mount St. Helens Volcanic Advisory (Alert Level Two)

Oct. 1 - Oct. 5, 2004: Brief, explosive steam emissions, some with minor amounts of ash, while seismicity fluctuated but quickly returned to higher levels and included several episodes of harmonic tremor. Alert Level Rasied to 3 10/2/04
Oct. 5 - Oct. 6, 2004: Seismicity proceeded at much lower energy levels. Smaller events recorded nearly continuously on the closest stations. - Alert level lowered to 2

  • CURRENT UPDATE - Latest News, Joint from CVO and PNSN
  • CVO Eruption 2004 - Archives & Links

  • Average signal amplitudes over this sequence - from the PNSN
  • Mount St. Helens Seismicity - from the PNSN
  • Dome Growth - LIDAR Images show dome growth
  • Webicorder and spectrograph archives for this sequence - from the PNSN
  • Crater glow - movies showing enhanced images of the the nighttime glow
  • Live Volcano-cam of MSH crater - From the US Forest Service
  • Loop of images from Forest Service volcano-cam of MSH crater Today's images - available at schools (.edu,.org, and .gov)
  • Volcanic Ash - What it is, what it does, and how to prevent damage - from the USGS
  • BACKGROUND - From CVO

  • HSR Webicorder - Flank station HSR Map

    Current Photos of Mount St. Helens - From CVO
    MSH Photo, 2004 eruption Recent MSH Photo - download & details - from CVO


  • This is file /SEIS/PNSN/NEWS/pressrelease.html
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