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One reason we did not venture too close to the crater rim is that the ground was hollow beneath our feet. By tapping our sticks we could hear a hollow sound. The hardened lava flow is not thick or dense, being filled with many gas bubbles. The bubbles also make broken shards of lava as sharp as glass.
Exposure mode: program (auto)
Metering Mode: matrix
Exposure time: 0.0080 s (1/125)
Aperture: f/2.8
Focal length: 8.0mm (35mm equivalent: 37mm)
ISO: 400
Flash: No
File size: 2973982 bytes
Camera maker: FUJIFILM
Camera model: FinePix F10
Resolution: 2848 x 1898
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