1 Episode results for "Dr Seth Moran"
Scientists study volcanic lightning
"You're just a couple of days away from the fortieth anniversary. Mount Saint Helen's nineteen eighty eruption. And as Komo's Ryan Harris tells us all these years later the mountain is still teaching US lessons. There's a lot of learning at Mount Saint. Helen says Dr Seth Moran the scientists in charge of the US Geological Surveys Cascades Volcano Observatory. Who tells me they're still a lot being gleaned from the main event and the eruptions that happened in the weeks and months after to understand the dynamics of how the cloud devolved questions right now. People are getting into about the generation of volcanic lightning and there was no lightning. Those observed reported and we can see some deposits. We have a pretty good idea of the timing of some of those deposits relative to say when Bulk Lybian was was being generated. Some interesting ideas that are starting to be developed about win. Volcanic lightning occurs in interruption sequence. And what it means when it starts happening in terms of bashing the air. How hard can we go? And things like that. Miranda's the big lesson. Though is still the lateral blast and landslide caused by the eruption which broke trees like they were matchsticks or burned everything in its path because of the hot gases that escaped not to mention burying much of the area in deep debris and sending a mud flow down the north fork the toodle river. The landslide was what took the pressure off of the magma that intruded into the volcano and generate a lateral blast and it was certainly appreciated. That's the bulging of north flank of moving out at a rate of five or six feet a day that was producing a flank that was unstable and it was certainly understood. That rockfalls landslides avalanches. Were in the future of Mount. Saint Helen's but it wasn't appreciated helbig. That landslide of wasn't how instantaneous was. GonNa it was GONNA be an Moran says since then geologists have learned a lot about what deposits from that kind of a landslide look like around volcanic areas and have taken that lesson and applied it to volcanoes around the world. And it's now much more appreciated. By the volcano community that landslides are part of what volcanoes can do. And that is something that in certain situations where you've got an unstable flanks. That's obviously building our that. That's a very real thing that needs to be taken into account when doing hazard assessments. Those hazard assessments are important because Dr Miran reminds me of something we should all keep in mind not only is Mount Saint. Helen's still active but so are several other cascades volcanoes including Mount Ranier.