Santa Ana, El Salvador's highest volcano, is a massive, 2381-m-high stratovolcano that rises immediately west of Coatepeque caldera.
A volcano caldera is a depression in the ground created by the collapse of land after a volcanic eruption. In some cases, the caldera is created slowly, when the ground sinks down after a magma chamber is emptied. In other situations, the magma explodes violently, and the caldera is the deep pit in the ground that remains after the volcano blows its top off. Stamps
(left) The stamp is from a set of 2 stamps issued in 2008 under the theme "82 years of radio communication".
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