Xiaoyoukeng

Sender: RachelDing

Xiaoyoukeng, Yangmingshan National Park, Taiwan

I read that the biggest attraction here is the sulfur pit of volcanic fumaroles and steam gushing out of the mountainside can probably be seen. Ooh, I'd like to see that!

Kilauea Volcano

Sender: Hootnoodle
Memories of Hawaii
Kilauea Volcano is located in Hawaii Volcanoes National park, on the big island of Hawaii. Kilauea is one of the world's most active volcanoes.

Merapi Volcano

Sender: Larissa

Merapi Volcano 

Merapi Volcano is the most active volcano in Indonesia. In 2010, it erupted killing many victims and displacing many people from the area. The volcano was put on alert status as there was a small eruption in July 2012.

Northern Lights in Russia

Sender: Mad_Madchen

I can't read the Russian words at the back of the card but I think it shows the Northern Lights (Aurora Borealis) in Russia. Beautiful colours..

WWF Postcard

Sender: Togge
Photo by Ismo Pekkarinen

A WWF postcard, showing a rainbow!! Can you see where it ends? Maybe there is a crock of gold there :)

Aurora Borealis - Finland

Sender: Liisa

Text on card: The Northern lights illuminate the frosty of the "blue twilight" period.

A Volcano in Kamchatka

Sender: Nasiya

Klyuchevskaya Sopka Volcano is an active cone-shaped volcano. It is located in the eastern part of Russia, in the Kamchatka Peninsula. It is said that this volcano is one of the world's tallest active volcanoes. 

The volcano is part of the natural UNESCO WHS.

Aurora Borealis

Sender: Seropi

Revontulet - Aurora Borealis - Northern Lights

Revontulet is the Finnish word for Aurora, "foxfire". Seropi's card show the lovely differences in the colours of  the Auroras. Apparently their colours differ according to altitudes. 

From wikipedia "Green is the most common of all auroras. Behind it is pink, a mixture of light green and red, followed by pure red, yellow (a mixture of red and green), and lastly pure blue".

I wish to see this phenomenon with my own eyes!

Northern Lights, Murmansk

A view of the Northern Lights in Murmansk
23 February 2011
Sender: Finerst

Aurora Borealis

11 February 2011
Sender: JasuHeppa
In Finnish, Aurora Borealis is "Revontulet" = Foxes Fire. In the olden days, Finnish people believed that they are the tails of firefoxes who live in the sky..
What a wonderful natural phenomenon. 

"The Aurora Borealis, also called the Northern Lights, are beautiful curtains of light created when fast electrons from the  solar wind slam into the rarefied gas of the upper atmosphere. The mechanism of action is similar to the way electrons in a television generate specks of light when they impact the phosphor-coated inside of the screen. However, the physics of the Aurora Borealis are complex, and not perfectly understood. The energy of certain types of aurora probably derives from adynamo effect of the interplanetary (solar wind-caused) magnetic field against the Earth's magnetic field. This is similar to the way electricity can be generated by rotating a magnet within an electromagnetic coil."