Here you can select the time from which the observations will be displayed. The last month will be used by default.
In this case, the search results in the middle of the page will show the findings reported to the Skywarden during the past month.
By clicking on the word 'ends' with the mouse, you will also see the end time of the search period. This is useful in situations where you want to look at observations from a period in the past, such as reports from a particular week in Skywarden.
Especially when looking at observations for a particular time period, you may want to do the search based on when the observed phenomenon actually happened instead of the time when it was sent to the observation database. In that case, you may want to select 'Observed' instead of the default 'Sent'. Please note that the browser uses a cookie to remember your choice of the start time of the search. If you have enabled cookies and do not clear them from your browser's cache, the same browser will display observations from the same time window you last selected the next time you use it.
Please note that the browser uses a cookie to remember your choice of the start time of the search. If you have enabled cookies and do not clear them from your browser's cache, the same browser will display observations from the same time window you last selected the next time you use it.
The "Sent" -option retrieves observations submitted to the Skywarden during the selected time period, regardless of when those phenomena were seen in the sky.
The selection “observed” retrieves the phenomena that appeared in the sky during the selected period, regardless of when they were reported to the Skywarden.
You can choose to show only phenomena of the desired level of visibility in the search results. For example, "at least III" removes the phenomena classified as the weakest (I-II). Similarly, "at least V" removes from the results all but the relatively rare phenomena or those classified as very impressive (V).
Here you can do a free-text search to the observations
The given text will bee searched from observation titles,descriptions, technical details and identified phenomena
You can search for any persons observations by writing the observer's whole name or part of the name here. For example 'John Smith' or 'John S'
You can also performa a search based on asspciation/team name or part of the name, like "Lahden Ursa".The search will bring up observations, that exactly match the given string.
To find observations made in some specific location, type the municipality name to the search field. For example, "Mikkeli"
You can also list multiple locations by separating them with a comma.For example "Mikkeli, Hirvensalmi, Juva, Kangasniemi". In this case, the search will return findings that match the locations listed.
In this field, you can search for more detailed phenomenon identifiers included in the observation details.
Such are, for example, deep space object types such as "spiral galaxy" or "reflection nebula" or halo forms such as "sundog" or "sun pillar".
You can also list multiple types of phenomena by separating them with a comma. A search will bring up findings that match one or more of the terms you listed.
By narrowing down the search date limits and typing, for example, "northern lights", you can see all the northern lights seen within a certain time period.
Copyright © 2023 Sirkka Karppinen. All rights reserved.
Visibility I / V
A double rainbow would walk across the sky during a rainstorm. The cell phone picture is really dim, but it looks like there are two rainbows. The phenomenon is visible for a very short time.
Kaksoissateenkaari käväisi taivaalla sadekuuron aikana. Kännykkäkuva todella himmeä, mutta näyttäisi siinä kaksi sateenkaarta olevan. Ilmiö hyvin vähän aikaa näkyvissä.
Primary rainbow or 1st order rainbow, is an arc that appears in the colors of the spectrum and is created when light is refracted and reflected in raindrops in the sky. Its outer color is red and its inner color is blue / purple.
The main rainbow is visible on the opposite side of the sky from the light source that causes it. A typical light source is the Sun, but extremely rarely the Moon can also cause a rainbows. The lunar rainbows have an own category in Skywarden.
One or more supernumerary bows may occur inside the main rainbow.
The fully developed main rainbow is at the point of the shadow of the observer's head, i.e. the ring surrounding the so-called antisolar point. Usually the phenomenon is interrupted by the horizon, but from the air, the rainbow can be seen as a perfect circle continuing below the horizon.
The rainbow gradually turns into a fogbow as the droplet size decreases. The smaller the droplets are, the smaller the rainbow is in size. Rainbows caused by the smaller droplets tend also to be thicker and the white color begins to dominate them. Usually, rainbow and fogbow are clearly separate phenomena, but sometimes intermediate forms can occur.
Colors can be used as the primary guideline for distinguishing different bow-like phenomena. If the bow shows colors of the spectrum and is not white, it is a rainbow. If, on the other hand, the arc is mainly dominated by white and some of the colors in the spectrum are missing, it is a fogbow.
Anomalies can sometimes be seen in the appearance of rainbows. They are reported in Skywarden by clicking the box for an anomalous rainbow. One anomaly is a point of discontinuity where the radius of the rainbow changes. The second is the division of the rainbow into two separate arcs.
Rainbows of four different orders have been observed. A secondary rainbow, i.e. a 2nd order rainbow, occurs often outside the primary rainbow. 3rd and 4th order rainbows are very rare and occur in the direction of the light source (eq. on both sides of the Sun). Each order of rainbows in Skywarden has its own phenomenon identification tag/button.
Primary and secondary rainbow. Image by Eetu Saarti.
Primary (on the left) and secondary rainbow (on the right). Image by Vesa Vauhkonen.
The primary rainbow is often seen as just a band of colors close to the horizon. Photo by Eetu Saarti.
When the Sun is close to the horizon, the colors of the rainbow turn red. Primary rainbow can be seen on the left side of the picture along with a faint secondary bow on the right. Image by Vesa Vauhkonen.
Primary rainbow from plane. Also a faint secondary bow is visible. Photo by Jouni Finnilä.
Primary rainbow with supernumerary bows within the main arc. Photo by Arja-Sisko Airila.
Strange weather condition with the primary rainbow in the horizon (Sun is at the height of 42 degrees). A faint secondary rainbow is also visible in the sky. Image by Jouni Matula.
In dense rain, a rainbow may appear against nearby buildings or the forest. Here the main rainbow stands out weakly against the forest behind the apartment building. Photo by Matias Takala.
This slightly divided main rainbow (at the top) is probably a sign of flattened water droplets. Image by Jaakko Kuivanen
Secondary rainbow or 2nd order rainbow ,is an arc that appears in the colors of the spectrum. The colors are created when light refracts and is reflected in raindrops in the sky. A secondary rainbow is almost always observed with a brighter primary rainbow. The outer color of the secondary rainbow is blue / purple and the inner color is red. The color order of the main rainbow is reversed.
These two rainbows are located on the opposite side of the sky from the light source that causes them. A typical light source is the Sun, but extremely rarely the Moon can also cause rainbows in Finland. The rainbows of the moon have their own phenomenon identification in Skywarden.
The main and side rainbows theoretically encircle the spot of the observer's head's shadow, i.e. the so-called antisolar point, as complete rings. Usually, however, their appearance is interrupted by the horizon.
The econdary arc in theory always occurs with the main rainbow, but sometimes a distant downpour or sunshine can be limited so that the main rainbow is not visible. Another exceptional situation is when the light source is so high that the main rainbow is already below the horizon, but the side rainbow is still above the horizon. The radius of the main rainbow is 42 degrees, which means it falls below the horizon at an altitude of 42 degrees. The radius of the side rainbow is 51 degrees.
Four rainbows of different orders have been observed. 3rd and 4th order rainbows on the Sun are very rare. Each order rainbow has its own phenomenon identification in Skywarden.
A bright primary rainbow with fainter secondary rainbow. The colors are reversed in arcs. Image by Aki Taavitsainen
The red color on the inner edge of the arc reveals that this is a secondary rainbow. Photo by Mirko Lahtinen.
Anomaalinen sateenkaari on sateenkaaressa näkyvä poikkeama. Näitä poikkeamia on pääsääntöisesti kahden tyyppisiä.
Ensinnäkin sateenkaaren havaitaan joskus jakautuvan kahdeksi kaareksi. Jakautuminen tapahtuu kun riittävän suuri osa pisaroista on litistyneitä. Jo 1-2% litistyminen pyöreästä muodosta aikaansaa selvän jakautumisen. Alempi kaari on tällöin litistyneiden pisaroiden aikaansaama. Simulaatioissa jakautuminen tapahtuu havaintoja noudatellen sateenkaaren yläosaa kohti.
Jakautunut sateenkaari saattaa olla mahdollista sekoittaa interferenssikaariin. Interferenssikaaret ovat kuitenkin samalla etäisyydellä pääsateenkaaresta kun taas litistyneiden pisaroiden aiheuttama kaari erkanee ylöspäin mentäessä pääsateenkaaresta yhä kauemmaksi.
Toinen sateenkaarissa havaittava anomaalia on epäjatkuvuuden kohta, jossa sateenkaaren säde muuttuu. Tämä on merkki pisarakoon jyrkästä muutoksesta anomalian kohdalla. Mitä pienempiä pisarat ovat, sitä pienempi on myös sateenkaaren säde.
Kuvassa näkyvä sateenkaaren epäjatkuvuus lienee merkki pisarakoon jyrkästä muuttumisesta. Kuva Jaakko Kuivanen.
Kahtia jakaunut sateenkaari kertoo että ilmassa on pyöreiden pisaroiden lisäksi litistyneitä pisaroita. Kuva Marko Riikonen.
Kahtia jakautunut sateenkaari. Kuva Jaakko Kuivanen.
Tämä sateenkaari näyttää jakautuvan yläosaa kohti tavalla jota ei voi selittää pelkällä interferenssikaarella. Luultavasti kyse on litistyneiden pisaroiden aikaansaamasta ilmiöstä. Kuva Jari Luomanen.
Simulaatio jossa on käytetty sekä pyöreitä pisaroita että pisaroita jotka ovat litistyneet 2.5%. Jakautuminen tapahtuu sateenkaaren yläosaa kohti ja näkyy vain pääsateenkaaressa. Simulaatio Les Cowley.
Ohoh, onpas hieno kahdentunut pääkaari! Siis kahdella tapaa tuplakaari :)
Harvinaisen selkeä tapaus. Yritin vähän ehostella kuvaa, että olisiko sivukaaressakin erotettavissa kahdentumaa, mutta jpg:n säätövara ei riitä.
Kiitos kommentista :) Pyörittelin kuvia vielä lisää Lightroomissa. Vähän paremmin sain kaaret näkyviin, mutta tuskin niistä tuli sen selkeämpiä otoksia kuin jo olitkin siellä kokeillut. Kännyssä ei ollut kuin jpg asetuksena.
Comments are checked and moderated before publication If you want to contact the observer directly about possibilities to use these images, use the Media -form.
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