Hekla eruptions often result in multiple hazards, including tephra emissions, lava flows, pyroclastic flows and flooding due to snow-melt. Depending on weather conditions at the time of the next eruption, fine-grained ash could be lofted to high
elevation, with international implications for air travel. Since 1970, the volcano has erupted at roughly decadal intervals (1970, 1980-81, 1991 and 2000
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