arXiv subjects

Andrei Ol'khovatov

Publications and source records attributed to Andrei Ol'khovatov.

12 recordsLinked to original sources

arXiv2026

The 1908 Tunguska event in data of the nearest weather station

This paper is a continuation of a series of works, devoted to various aspects of the 1908 Tunguska event. In this paper data is discussed from a weather station in the settlement of Kezma. This weather station was the nearest one to the epicenter of the 1908 Tunguska event. The station was about 215 km southwards from the epicenter. Also eyewitness accounts from Kezhma and some places on the Angara River are considered. The paper demonstrates the diversity of optical manifestations of the 1908 Tunguska event reported from Kezhma and its surroundings. A note by the observer of the weather station in Kezhma, concerning, in particular, the appearance of the two huge fiery circles is very important. The weather log of the weather station shows that the Tunguska event occurred during the sharp increase in cloud cover and deteriorating weather. At the beginning of July, rains and thunderstorms, including hail, began according to the weather log. In the opinion of the author, the data of the Kezhma weather station and the eyewitness accounts are in agreement with the geophysical interpretation of the 1908 Tunguska event. In any case, the meteorological factor is an important aspect of the Tunguska event, and so it deserves detailed research.

physics.pop-ph↗

arXiv2025

The 1908 Tunguska event and some distant phenomena

This paper is a continuation of a series of works, devoted to various aspects of the 1908 Tunguska event. This usually refers to an explosive phenomenon associated with the appearance of a forestfall, named nowadays as the Kulikovskii one. However, several other notable natural phenomena occurred in the Central Siberia on June 30, 1908. This paper considers geomorphological features, reports of substance discoveries, forestfalls, and earthquakes. The general conclusion is that the Tunguska event was a very complex phenomenon. Research of the Tunguska event requires the participation of experts in various fields.

physics.pop-ph↗

arXiv2025

The 1908 Tunguska event and the atmospheric optical anomalies

This paper is a continuation of a series of works, devoted to various aspects of the 1908 Tunguska event. In the late June - early July, 1908 there were various optical anomalies in the atmosphere. Early the Author already considered "bright nights", and in this paper some other atmospheric optical anomalies are considered, such as prolonged twilights, etc. Much attention is paid to the review of works on the study of atmospheric transmission at the Smithsonian Astrophysical Observatory in 1908. The main features of the atmospheric optical anomalies and their consequences for the interpretations of the Tunguska event are described. It is shown that neither the asteroidal nor the cometary interpretation of the Tunguska event is consistent with the anomalies. The geophysical interpretation can explain the atmospheric optical anomalies at the qualitative level at least. Quantitative explanation is currently difficult due to limited observational data and the lack of clarity in the details of physical phenomena.

physics.pop-ph↗

arXiv2025

Some Geophysical Aspects Of The 1908 Tunguska Event

This paper is a continuation of a series of works, devoted to various aspects of the 1908 Tunguska event. In this paper its author would like to draw attention to some geophysical aspects of the 1908 Tunguska event. A review of some geophysical aspects and some minor analysis of the aspects is presented in this paper. Special attention is paid to global seismic events at those times. As the epicenter of the forest-fall was in the center of a paleovolcano, so some info concerning the paleovolcano is presented. An idea was put forward about possible relationship of the geophysical peculiarities with the atmospheric optical anomalies reported at those times.

physics.geo-ph↗

arXiv2025

Some Historical Misconceptions and Inaccuracies Regarding The 1908 Tunguska Event

This paper is a continuation of a series of works, devoted to various aspects of the 1908 Tunguska event. A large number of hypotheses about its causes have been put forward already. However, so far none of them has received convincing evidence. This is probably why new hypotheses appear almost every year, not only in the mass-media, but also in scientific literature. At the same time, any hypothesis should not contradict the known facts about the event. Unfortunately, the authors of new hypotheses, as well as the authors of popular science articles, often use data, many of which turned out to be not entirely accurate, or even incorrect. In this paper some of this data will be considered. Also the history of the Tunguska research is considered in this paper. Some other aspects of the 1908 Tunguska event are considered too.

physics.pop-ph↗

arXiv2025

The 1908 Tunguska Event and Bright Nights

This paper is a continuation of a series of works, devoted to various aspects of the June 30, 1908 Tunguska event. In those days, various sky optical anomalies were observed over a large area. In the presented paper, the main focus is on bright nights. Bright nights are the glow (airglow) of the night sky, visible to the naked eye. In the author's opinion, atmospheric gravitational waves played a large role in their appearance in 1908, as evidenced by the behavior of atmospheric pressure in late June and early July 1908. Some other geophysical peculiarities of that period, which could have affected the appearance of bright nights, and possibly other optical sky anomalies, are also considered.

physics.ao-ph↗

arXiv2023

The Evenki accounts of the 1908 Tunguska event collected in 1920s-1930s

This paper is a continuation of a series of works, devoted to various aspects of the 1908 Tunguska event. It is devoted to the Evenki accounts of the 1908 Tunguska event collected in 1920s - 1930s. It is important to research accounts of Evenki who were rather close to the epicenter. The Evenki accounts are important also, because Evenki are natural hunters and pathfinders - their lives depend on their memory and vision. Most of the reviewed in this work accounts were collected at the Evenki conference, when telling a lie was considered to be a serious misconduct. These Evenki accounts are compared with other Tunguska accounts. Also weather conditions associated with the Tunguska event are considered. Some manifestations of the Tunguska event are discussed.

physics.hist-ph↗

arXiv2023

The 1908 Tunguska event: analysis of eyewitness accounts of luminous phenomena collected in 1908

Historically there were two main reasons to assign the 1908 Tunguska event to a spacebody infall: a) newspaper notes about a fall of a meteorite near the town of Kansk (later claimed to be false); b) eyewitnesses reports about seeing luminous phenomena in the sky. This paper examines accounts of the Siberian eyewitnesses about luminous phenomena in the sky, collected in 1908, immediately after the event. The conducted generalization of the available accounts reported in 1908 indicates that eyewitnesses reported several types of luminous phenomena.

physics.pop-ph↗

arXiv2022

The 1908 Tunguska Event And The 2013 Chelyabinsk Meteoritic Event: Comparison Of Reported Seismic Phenomena

Till now there is no solid scientific proof for any of the numerous hypotheses proposed for the Tunguska 1908 event. Regarding the most popular "spacebody infall" interpretation it is reasonable to compare the Tunguska event with the 2013 Chelyabinsk meteoritic event which energy deposition was about a half megaton TNT. In this paper seismic manifestations are compared. The comparison demonstrates that while a "seismic image" of the 2013 Chelyabinsk meteoritic event is an agreement with the "spacebody infall" theory, the 1908 Tunguska event one strongly differs. There are evidences of a swarm of earthquakes on June 30, 1908 in the region of the Tunguska event manifestation.

physics.pop-ph↗

arXiv2021

The 1908 Tunguska event and forestfalls

The 1908 Tunguska event is used to be associated with a forestfall named after its first scientific researcher -- Leonid Kulik.However association of the Kulikovskii forestfall with the events in the morning of June 30, 1908 is based only on Evenks accounts. Initially, Kulik assumed the impact site was about 60 km east of this forestfall (unknown to him at that time). Then he received additional information about the existence of this large forestfall, and moved the search point. Later, some other forestfalls were reported, albeit of a much smaller area. Dates some of them can't be pinpointed accurately, i.e. only "about June 30", and so on. However Evenks reported about several small forestfalls in the region which according to them occurred on the same morning as the Kulikovskii one. But as they were much smaller then a little attention was paid to them (with the exception of the so-called Chuvar forestfall). This paper is devoted to consideration of these forestfalls (including some peculiarities of the Kulikovskii one). The paper focuses on facts (and not on interpretations), which any interpretation of the 1908 Tunguska event should explain.

physics.pop-ph↗

arXiv2021

Electrophonic sounds from meteors and auroral audibility

Electrophonic sounds from meteors are sounds simultaneous with meteors (i.e. without delay). They are known for hundreds years. At least several hypotheses were put forward, but none of them received confirmation. Most hypotheses consider the energy of the meteoroid as a source of sound energy. In the early 1990s the author published several articles with another idea - a meteoroid is just a trigger of some processes which cause (in favourable geophysical conditions) electrophonic sounds. In this paper new arguments in favor of this idea are presented. Much attention is paid to sounds of aurora, which (in the author's opinion) could help better understand electrophonic sounds from meteors.

physics.pop-ph↗

arXiv2020

Some comments on events associated with falling terrestrial rocks and iron from the sky

Some examples of the events associated with falls of rocks and iron terrestrial origin from the sky are considered (in scientific publications they are often called as meteor-wrongs or pseudo-meteorites). Their possible connections with other natural phenomena (like a whirlwind and a ball-lightning) are considered. Some compilation of info connected with the event in the US town of Elma in 2003 is presented. Also some possible parallels with the 1908 Tunguska event are given. The author hopes to draw attention to the need for more detailed research of such phenomena.

physics.geo-ph↗