Rumbleometer
Temperature Data
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The rescued rumbleometer was in remarkably good condition. Only the yellow plastic "hard-hats" that protect the glass ball flotation were melted in a few spots where they had come in contact with the lava. | |
Even though the lava was erupted at a temperature of about 1200°C (~2200°F), the instrument was kept relatively cool because it was bathed in frigid seawater (2°C) which dissipated most of that heat. Also, the lava quickly forms a solid crust over its molten surface, which greatly insulates the heat below. The temperature sensor on board the rumbleometer only recorded a 4°C increase in temperature during the eruption! Amazing! | |