The volcano has been in a state of “heightened unrest” for more than a month, with the number of earthquakes rising from between 10 and 20 per day to 40 to 50 per day, likely due to an increase in magma inside the volcano, according to the Hawaiian Volcano Observatory.
The strongest was a 5.0-magnitude earthquake that struck the Big Island two weeks ago, although local officials said it did not cause major damage or injuries.
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