Qualla: The Eye of Krakatoa

The Eye of Krakatoa: Introduction

Thu, 02 Apr 2026 00:00:00 GMT

Photo credit Lord Mountbatten, CC BY-SA 3.0. Geologists call it "the Eye of Krakatoa." Halfway up the sheer northern cliff of Rakata, a lenticular bulge of solidified magma six meters across stares out from the rock face like the pupil of some buried titan. It sits at the terminus of the largest of more than 25 volcanic dikes exposed in cross-section along the cliff -- a geological record laid bare with the precision of a surgeon's cut. On the morning of August 27, 1883, the northern half of this mountain simply ceased to exist, torn away in an eruption that collapsed two-thirds of Krakatoa island into the sea. What remained was this: the southern half of Rakata, its interior exposed to the sky, standing 813 meters above the Sunda Strait like a broken tooth in an empty jaw.

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Image: Lord Mountbatten | CC BY-SA 3.0

The Eye of Krakatoa: The Peak That Survived

Thu, 02 Apr 2026 00:00:00 GMT

Photo credit Dr. W.G.N. (Wicher Gosen Nicolaas) van der Sleen (Fotograaf/photographer)., CC BY-SA 3.0. Before the catastrophe, Rakata was known simply as "the Peak" -- the largest and southernmost of three volcanic cones that formed the island of Krakatoa. Danan occupied the center at 450 meters. Perboewatan, the lowest at 120 meters, sat to the north. All three shared a common ma...

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Image: Dr. W.G.N. (Wicher Gosen Nicolaas) van der Sleen (Fotograaf/photographer). | CC BY-SA 3.0

The Eye of Krakatoa: A Cliff Like No Other

Thu, 02 Apr 2026 00:00:00 GMT

Photo credit Lip Kee from Singapore, Republic of Singapore, CC BY-SA 2.0. The vertical face that the 1883 eruption left behind is one of the most striking geological exposures on Earth. Rakata's entire eruptive history is written in that wall of rock: layer upon layer of lava flows, ash deposits, and intrusive dikes, each one a chapter in a story stret...

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Image: Lip Kee from Singapore, Republic of Singapore | CC BY-SA 2.0

The Eye of Krakatoa: Genesis from Ash

Thu, 02 Apr 2026 00:00:00 GMT

Photo credit Lord Mountbatten, CC BY-SA 3.0. When scientists reached Rakata in May 1884, nine months after the eruption, they found the island scoured nearly to sterility. The blast had buried everything under meters of hot ash and pumice. One spider, sheltering in a crevice on the southern face, was the sole animal survivo...

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Image: Lord Mountbatten | CC BY-SA 3.0

The Eye of Krakatoa: The Laboratory That Keeps Resetting

Thu, 02 Apr 2026 00:00:00 GMT

Photo credit Uprising, CC BY-SA 3.0. What makes Rakata uniquely valuable to science is the cruelty of its neighbor. Anak Krakatau, the volcanic island that began rising from the caldera in 1927, erupts frequently enough to disturb the recovering ecosystem on nearby Rakata -- ash falls, acid rain, shockwaves through ...

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Image: Uprising | CC BY-SA 3.0

The Eye of Krakatoa: The Survivor's Silhouette

Thu, 02 Apr 2026 00:00:00 GMT

Photo credit Lip Kee from Singapore, Republic of Singapore, CC BY-SA 2.0. From the air, Rakata's profile is unmistakable. The southern slope rises gently, cloaked in green where tropical forest has reclaimed the mountainside. Then the summit drops away into nothing -- a vertical plunge to the sea where the northern half used to be. The contrast is dram...

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Image: Lip Kee from Singapore, Republic of Singapore | CC BY-SA 2.0