{"id":28321,"date":"2019-09-19T10:39:33","date_gmt":"2019-09-19T14:39:33","guid":{"rendered":"https:\/\/blogarchive.utc.edu\/news\/?p=28321"},"modified":"2019-10-03T10:24:00","modified_gmt":"2019-10-03T14:24:00","slug":"seismometer-on-campus-detects-tiny-vibrations-in-earth-even-from-hurricane-dorian","status":"publish","type":"post","link":"https:\/\/blogarchive.utc.edu\/news\/2019\/09\/seismometer-on-campus-detects-tiny-vibrations-in-earth-even-from-hurricane-dorian\/","title":{"rendered":"Seismometer on campus detects tiny vibrations in Earth, even from Hurricane Dorian"},"content":{"rendered":"
\"\"

The equipment that John Mies uses can detect earthquakes on the other side of the Earth.<\/p><\/div>\n

When North Korea fired off its nuclear missile test on Sept. 3, Jon Mies could pinpoint the exact moment the launches took place.<\/p>\n

How? An earthquake-detecting seismometer on the UTC campus picked up vibration, which showed up as a spike on the machine\u2019s readings.<\/p>\n

\u201cIt was small, tiny. I had to look pretty hard for it. But sure enough, we\u2019ve got a little \u2018tick,\u2019 \u201d Mies says. \u201cThat\u2019s a man-made earthquake. Gosh, it\u2019s tragic, but interesting in the way that we could detect it.\u201d<\/p>\n

Mies\u2019 eyes practically sparkle when he starts talking about the campus seismometer and how it\u2019s sensitive enough to read the slightest earthquake tremor\u2014known as a microseism\u2014even though it\u2019s measured in nanometers.<\/p>\n

\u201cThey\u2019re vibrations so small, we don\u2019t sense them,\u201d says Mies, UC Foundation R.L. Wilson professor in biology, geology and environmental science. \u201cI can tell the difference between the Monday-Wednesday-Friday schedule here and the Tuesday-Thursday schedule because everyone moving on campus shakes up the ground.\u201d<\/p>\n

\"\"

This is the electronic readout that shows when North Korea conducted a nuclear missile test. The green spike is the moment of launch.<\/p><\/div>\n

While the equipment is used in classes that deal with earthquakes, it recently picked up information on the effects of Hurricane Dorian from an earth-shaking point of view. The information collected had nothing to do with the strength of the storm or its destructive power, but the data revealed wave patterns on the ocean and how they were\u2014or weren\u2019t actually\u2014affected by Dorian.<\/p>\n

It\u2019s easy to see waves generated by the hurricane as they rush toward the coast, Mies explains, but once they hit the coast, new waves rebound back to the ocean and it\u2019s very hard to see them. The rebounding waves hit the incoming waves and the collision creates a water column that moves up and down, exerting pressure on the ocean floor.<\/p>\n

\u201cIt\u2019s pulsing, kind of like doing CPR on the ocean floor, and that is causing the vibration in the earth\u2019s crust that is radiating from that spot,\u201d Mies says.<\/p>\n

The vibrations were picked up by the seismometer at UTC. Like a proud papa, Mies points out the machine\u2019s readings. The three lines, which look like the waveforms from software that opens an audio file, are different colors\u2014green is up\/down, red is north\/south, blue is east\/west. The thickness of the lines reveals the size of the tremors and, while Dorian\u2019s wave-generated tremors were pretty much constant, coming every six or seven seconds, they were miniscule in comparison to a true earthquake.<\/p>\n

At this point, seismometers can\u2019t detect a hurricane\u2019s strength; a Category 4 storm generates the same wave pattern as a Category 1.<\/p>\n

\u201cYou\u2019ve got a lot of variables here,\u201d Mies says. \u201cYou\u2019ve got the storm\u2019s distance from the coast; you\u2019ve got the shape of the coast\u2014I actually think that\u2019s very important\u2014you\u2019ve got water depth. They\u2019re almost never controlled. A storm comes and Mother Nature doesn\u2019t comply very well.\u201d<\/p>\n

So what\u2019s the practical uses from detecting the waves\u2019 tmicroseisms? Not much right now, Mies acknowledges, but that\u2019s doesn\u2019t mean they\u2019re useless.<\/p>\n

\u201cRight now what we\u2019re talking about is largely an academic interest. Academics tend to relish this kind of thing.<\/p>\n

\u201cBut it probably has hidden uses. Along those lines, it will have applications somewhere else. It\u2019s not like it\u2019s without purpose, we probably don\u2019t see those purposes yet.<\/p>\n

\u201cAnd that\u2019s the way a lot of this works. There\u2019s a lot of science that begins sort of esoteric and lo and behold there\u2019s an application of it somewhere.<\/p>\n

\u201cSomewhere way back in the history of Corningware, some other scientist said, \u2018Wait a minute, this material is marvelous. Let\u2019s make this out of it.\u2019 Something like that.\u201d<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

An earthquake-detecting seismometer on the UTC campus picked up vibration, which showed up as a spike on the machine\u2019s readings according to Joe Mies, UC Foundation R.L. Wilson professor in biology, geology and environmental science.<\/p>\n

Continue Reading <\/a><\/span><\/p>\n","protected":false},"author":1105,"featured_media":28323,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","_ef_editorial_meta_date_first-draft-date":"","_ef_editorial_meta_paragraph_assignment":"","_ef_editorial_meta_checkbox_needs-photo":"","_ef_editorial_meta_number_word-count":"","_ef_editorial_meta_checkbox_slider":"","_ef_editorial_meta_checkbox_featurette":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[64,70,123865,15,61,3,7712,48007],"tags":[83614,83613,83612,83615],"class_list":{"0":"post-28321","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-academics","8":"category-biology-geology-and-environmental-science","9":"category-campus","10":"category-college-of-arts-sciences","11":"category-community","12":"category-faculty-and-staff","13":"category-news","14":"category-research-academics","15":"tag-earthquakes","16":"tag-hurricane-dorian","17":"tag-john-mies","18":"tag-seismometer","19":"entry"},"yoast_head":"\nSeismometer on campus detects tiny vibrations in Earth, even from Hurricane Dorian | UTC News Archive: Jul 2007 - Oct 2025<\/title>\n<meta name=\"description\" content=\"An earthquake-detecting seismometer on the UTC campus picked up vibration, which showed up as a spike on the machine\u2019s readings according to Joe Mies, UC Foundation R.L. 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