View source for Lake Yanisyarvi

{{short description|Lake in Republic of Karelia, Russia}}
{{expand Finnish|date=June 2023|topic=geo}}
{{expand Russian|date=February 2024|topic=geo}}
{{Infobox lake
|name=Yanisyarvi
|image =Janisjarvi crater lake 01.jpg
|caption =
|image_bathymetry =
|caption_bathymetry =
|location = [[Republic of Karelia]]
|coords = {{coord|61|58|N|30|55|E|type:waterbody_region:RU-KR_scale:500000|display=inline,title}}
|pushpin_map = Russia#Russia Karelia
|type = [[Impact crater lake]]
|inflow =
|outflow = [[Jänisjoki]]
|catchment =
|basin_countries = Russia
|length =
|width =
|area =
|depth = {{convert|11.6|m|abbr=on}}
|max-depth = {{convert|57|m|abbr=on}}
|volume =
|residence_time =
|shore =
|elevation =
|islands =
|cities =
}}
'''Lake Yanisyarvi''' ({{langx|ru|Янисъярви}}; {{langx|fi|Jänisjärvi}}) is a [[lake]] in the [[Republic of Karelia]], [[Russia]], located north of and draining to [[Lake Ladoga]].

The basin of this somewhat circular lake was formed by [[meteorite]] impact 700±5 million years ago during the [[Cryogenian]] period. The [[impact crater|crater]] is {{convert|14|km|mi|sp=us}} in diameter.<ref>{{cite Earth Impact DB|name=Jänisjärvi|linkname=janisjarvi|accessdate=2009-08-19}}</ref>

Prior to [[World War II]], the lake was thought to be the second known volcanic [[caldera]] in [[Finland]] (the other was [[Lake Lappajärvi]]). Both were eventually recognized as impact craters.

==References==
{{Reflist}}

==External links==
*[https://web.archive.org/web/20080409191206/http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=17988 Lake Jänisjärvi Impact Crater] at [[NASA Earth Observatory]]

{{Impact cratering on Earth}}

{{DEFAULTSORT:Yanisyarvi}}
[[Category:Impact craters of Russia]]
[[Category:Neva basin|LYanisyarvi]]
[[Category:Impact craters of the Arctic]]
[[Category:Impact crater lakes]]


{{Earth-crater-stub}}
[[Category:Lakes of the Sortavalsky District]]