The new permanent seismic station SVZ started working in Arctic (Severnaya Zemlya archipelago, Bolshevik Island), we discuss the rst results of the local seismicity study. We have processed 46 local seismic events for 2017-2022. Data processing using a single seismic sensor is di cult but using waveforms and spectral-temporal analysis of P-, S-and surface waves it is possible to separate shallow earthquakes from glacial events. We distinguish two types of icequakes -glaciers and pulses. An increase in seismic background noise is related to with processes of glacial nature in summertime. Data processing allows to obtain the main peculiarities of local seismicity, i.e., mutual connection of glacial processes and crustal seismicity. We showed the presence of icequakes induced by local crustal events; their epicenters con ned to the ice domes edges. Spatial-temporal sequence and the rate of events migration show that the glacial events are result of the defusing deformations process in the glaciers caused by the impact of shallow. Thousands of pulsed and noise high-frequency micro-oscillations associate with the sea ice sheet or lake ice. The temporal variation of events' number and energy per day correlates with air temperature temporal variations. Moreover, there is a sharp increase in the number of pulses with sharp temperature changes. The greatest activity of this pulsed events is in winter and especially in March, connected with ice surface destruction. In case of a network deployment is not feasible, even a single seismic station allows to get a useful information about the glacial and seismic processes.
Article HighlightsUsing a single permanent seismic station in the Severnaya Zemlya archipelago allows to make progress in the investigation of this poorly studied Arctic territory, in particular to get new information about the glacial and seismic processes.Between 2017-2022 we detected 46 seismic events with local magnitude from 0.2 to 4.9, 35 for October Revolution Island and 11 for Bolshevik Island. The seismic station temporarily did not work in 2019 and 2021. Using spectral and polarization analysis we were able to divide these events into two groups as shallow earthquakes and glacier events. Also, we show that October Revolution Island earthquakes induced icequakes in ice domes.We recorded the thousands of visible pulses greater than noise. Their number correlate to the air temperature sharp change and occurs most often in wintertime. The nature of such events is related to sea or lake ice sheet cracking.
