Composite lava flows on the Big Island of Hawai’i. Image one is of the accumulated flows from 5/15 – 6/17 in place over the Big Island. Image two is of the same data placed to scale over Palo Alto and rotated so it flows from Stanford University into the South Bay at the Dumbarton Bridge. This should give anyone who’s not familiar with the sale of the Big(!) Island a sense of how much territory the current eruption actually occupies.
The original data are taken from a series of Landsat 8 thermal IR images for the dates: 5/16 5/23 5/25 6/10 and 6/17. The data were added into a composite image then thresholded to remove low level thermal data and clouds over lava reflecting IR energy. The remaining data is a rough picture of where the most intense heat and flow activity has been over the past month, but does not depict total accumulation.