Morphometric Features of the Submarine Slope of the Southwestern Part of Valaam Island

Науменко, М. А.; Guzivaty, V. V.; Nesterov, N. A.; Sybetto, D. A.

doi:10.1134/s1028334x19050234

Cited by 5 publications

(2 citation statements)

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“…Several authors [2,21,22] wrote about the possibility of the existence of such ledges at the bottom of the northern part of Lake Ladoga. However, the listed publications dealt with single scarps up to several tens of meters high and with slopes up to 60°.…”

Section: Resultsmentioning

confidence: 99%

Tectonic Ledges at the Ladoga Lake Bottom

Anokhin

2023

Int J Earth Sci Geol

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Over the past few years, the Institute of Limnology of the Russian Academy of Sciences has been conducting extensive studies in Lake Ladoga, with special emphasis on the bottom geology and geomorphology. Since 2018, we have applied underwater robot vehicle (ROV) with video cameras. By the ROV we have discovered new geological and geomorphological properties of the lake, including the presence of underwater sub-vertical ledges, composed of several tens of meters high rock formations with tectonic origin.

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Section: Resultsmentioning

confidence: 99%

Tectonic Ledges at the Ladoga Lake Bottom

Anokhin

2023

Int J Earth Sci Geol

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“…All islands of the Valaam-Salma island string have the same origin and united geological base, which was tectonically split into different-sized blocks. By the way, it is considered that the rocks consists of quite dense medium mainly crushed or monolith gabbro-diabase [16,19].…”

Section: Introductionmentioning

confidence: 99%

SH-waveform modeling of small local seismic events in Ladoga lake

Nikitina

Val’kov

2020

SN Appl. Sci.

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A lot of seismic phenomena with small magnitude has been taking place in the Ladoga lake region (northwestern Russia). One of them is the earthquake which was recorded on the 31st of July, 2010 followed by the swarm of microearthquakes near Nikonovsky cape. There is only one station in the region that is why it is difficult to process the data. In this work, we propose a new approach to construct synthetic seismograms of the main event with minimum data. Also this approach applies us to calculate parameters of the source. The approximate magnitude of the main event is M L = −0.8 . For swarm events, we have magnitude values from − 1.0 to − 2.6 . The data of swarm events (microearthquakes) is used to test the technique of constructing synthetic seismograms. The approach we propose is based on Green's function method with using two temporal -sequences (the Lorentzian function and the continuous Dirichlet kernel). A comparison of synthetic and real seismograms shows that the Lorentzian function is better to describe small local events, and the continuous Dirichlet kernel is more appropriate for earthquakes. This approach can be generalized to various problems of different nature.

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