{"id":36859,"date":"2020-06-12T13:38:03","date_gmt":"2020-06-12T13:38:03","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=36859"},"modified":"2021-06-10T21:04:13","modified_gmt":"2021-06-10T21:04:13","slug":"mount-st-helens-june-1980","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/36859","title":{"rendered":"Mount St. Helens: June 1980"},"content":{"rendered":"\n

SMS-2<\/strong><\/p>

\"Vis<\/a>

Visible and Infrared NASA SMS-2 animation on June 13, 1980 between 02:30 and 07:00 UTC. The red square denotes the\u00a0 approximate location of Mount St. Helens, and the arrows highlight the plumes of the two separate eruptions.\u00a0 [Click to play mp4]<\/p><\/div>

The main Mount St. Helens eruption was May 18, 1980<\/a>\u00a0— yet there were also later paroxysmal<\/a> eruptions. Imagery from NASA’s SMS-2<\/a> (Synchronous Meteorological Satellite) monitored two more Mount St. Helens eruptions on June 12th (local time), 1980, as shown above. Note that in “UTC-time”, the eruption took place on June 13th. A similar side-by-side SMS-2 visible and infrared animation (without the arrows) is available here<\/a> (in addition to one without the red location box<\/a>).<\/p>

\"SMS-2<\/a>

NASA SMS-2 visible animation from June 13th (02:00 to 04:00 UTC), 1980. The red square denotes the\u00a0 approximate location of Mount St. Helens. [Click to play mp4]<\/p><\/div>

A visible band animation without<\/a> the red square at the location of Mount St. Helens is shown above. The second plume coated Portland (OR) with ash<\/a>. For more on this case, see Wikipedia<\/a> and the USGS<\/a>. Here’s the same loop and image<\/a>, but without the red location box.<\/p>

The volcanic ash plume was also evident in the infrared window band, below, but the imagery has fairly coarse spatial (and temporal) resolution compared to today’s GOES-R series ABI<\/a>\u00a0(which allows much improved volcanic cloud monitoring<\/a>). This longer <\/a>IR loop shows the 2nd plume as well.<\/p>

\"IR<\/a>

NASA SMS-2 infrared animation from June 13th (02:45 to 04:00 UTC), 1980. The red square denotes the\u00a0 approximate location of Mount St. Helens. [Click to play mp4]<\/p><\/div> \n\t\n\t\t\n\t\t\t<\/polyline>\n\t\t\t<\/polyline>\n\t\t\t<\/polyline>\n\t\t\t<\/polyline>\n\t\t\t<\/svg>\n\t\t<\/span>\n\t<\/span>\n<\/div>\n\n <\/p>

Swipe between SMS-2 Visible and Infrared bands. Red square notes Mount St. Helens location.<\/p> [Not supported for every browser.]

Fade<\/a> between a SMS-2 Visible and Infrared band.<\/p>

Note that there is a geolocation offset between the two spectral bands. The satellite times listed are the image scan start times.<\/p>

GOES-3<\/strong><\/p>

The experimental SMS series followed the ATS series<\/a>, and was a precursor to the operational GOES.<\/a><\/p>

GOES -3 also observed both volcanic ash plumes.<\/p>

\"GOES-3<\/a>

GOES-3 Infrared animation from June 13, 1980. [Click to play mp4]<\/p><\/div>

A slightly longer GOES-3 infrared animation is available here<\/a>. NASA SMS-2 and NOAA GOES-3 data are via the University of Wisconsin-Madison SSEC Satellite Data Services<\/a>.<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"

SMS-2 The main Mount St. Helens eruption was May 18, 1980\u00a0— yet there were also later paroxysmal eruptions. Imagery from NASA’s SMS-2 (Synchronous Meteorological Satellite) monitored two more Mount St. Helens eruptions on June 12th (local time), 1980, as shown above. Note that in “UTC-time”, the eruption took place on June 13th. A similar side-by-side […]<\/p>\n","protected":false},"author":21,"featured_media":37185,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[69,41,88,9],"tags":[],"class_list":["post-36859","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-goes-3","category-historical","category-sms-2","category-volcanic-activity"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/36859","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/users\/21"}],"replies":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/comments?post=36859"}],"version-history":[{"count":47,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/36859\/revisions"}],"predecessor-version":[{"id":41085,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/36859\/revisions\/41085"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/37185"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=36859"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=36859"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=36859"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}