{"id":11012,"date":"2012-08-06T23:59:48","date_gmt":"2012-08-06T23:59:48","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=11012"},"modified":"2012-08-07T22:16:58","modified_gmt":"2012-08-07T22:16:58","slug":"tongariro-eruption-in-new-zealand","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/11012","title":{"rendered":"Tongariro Eruption in New Zealand"},"content":{"rendered":"
\"Tongariro<\/a>

Tongariro Ash Plume as seen by VIIRS Day-Night Band on Suomi\/NPP<\/p><\/div>\n

Mount Tongariro in New Zealand (on the North Island) erupted on Monday, August 6th, for the first time in a century. A Suomi-NPP overpass at 12:52 UTC, approximately one hour after the eruption, allowed the day-night band to capture an image of the volcanic plume as it moved eastward across the central part of the North Island. The 3.74 \u00c2\u00b5m shortwave IR image<\/a> and the 11.45 \u00c2\u00b5m longwave IR image<\/a> show that the height of the plume is fairly high: brightness temperatures in the 11.45 \u00c2\u00b5m image are around 218 K or -55\u00c2\u00ba C. (VIIRS Imagery courtesy of William Straka, UW-Madison\/CIMSS). The minor eruption did disrupt air travel, with some flights cancelled in Gisborne, Taupa, Rotorua and Palmerston North.<\/p>\n

\"MTSAT<\/a>

MTSAT Enhanced Brightness Temperature Difference between 10.8 \u00c2\u00b5m and 12 \u00c2\u00b5m (click image to play animation)<\/p><\/div>\n

Volcanic Ash has different emissivity properties at 11 and 12 \u00c2\u00b5m; hence, the heritage method for detecting Volcanic Ash uses the difference in brightness temperatures at those two wavelengths. The loop above shows MTSAT-2 imagery; Note the spike in signal in the 1232 UTC image (about 30 minutes after the eruption) that continues to grow as it crosses the coast at 1332 UTC; it then moves rapidly eastward over the ocean.<\/p>\n

\"MTSAT<\/a>

MTSAT Visible Imagery at 1932 UTC on 6 August 2012<\/p><\/div>\n

Visible imagery from MTSAT at 1932 UTC, above, approximately 8 hours after the eruption, shows the ash cloud over the ocean east of New Zealand.<\/p>\n","protected":false},"excerpt":{"rendered":"

Mount Tongariro in New Zealand (on the North Island) erupted on Monday, August 6th, for the first time in a century. A Suomi-NPP overpass at 12:52 UTC, approximately one hour after the eruption, allowed the day-night band to capture an image of the volcanic plume as it moved eastward across the central part of the […]<\/p>\n","protected":false},"author":19,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[10,20,49,9],"tags":[],"class_list":["post-11012","post","type-post","status-publish","format-standard","hentry","category-general-interpretation","category-mtsat","category-suomi_npp","category-volcanic-activity"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/11012","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\/19"}],"replies":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/comments?post=11012"}],"version-history":[{"count":13,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/11012\/revisions"}],"predecessor-version":[{"id":11020,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/11012\/revisions\/11020"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=11012"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=11012"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=11012"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}