kamchatka by stepan krashinnikov in 1737, in my opinion.s here experimentally recorded this eruption. well, according to the residents. there was a very strong eruption of the inhabitants, everyone was preparing to die at the foot of the volcanoes in the village of klyuchi volcanologist yuri demenchuk with student lyosha is on his way to the seismic station. good afternoon. hello strongly. this is my wife , a seismologist alexei. this is alexei a student. very nice. you probably came to kamchatka and you know that we have here a seismically dangerous zone yes, that we are on the fault of tectonic plates and here we have our main volcanoes. here and around these volcanoes have seismic sensors that register all these earthquakes that occur under the volcanoes. right now i'm processing it. uh, it means an earthquake, which is located under the klyuchevskaya volcano. well, we go to the reception center, where the recording is in progress. here are these seismograms. so, this is our receiving device. where the signal is sent from it is recorded