Volcano flank instability imaged by historical air photos correlation during the 1975 M.7.7 Kalapana earthquake (Kīlauea, Hawaii)

Here attached historical aerial photos used to make optical imagery correlation during the 1975 Kalapana earthquake. These data were purchased from USGS archive and now are free to download for any user. However, here I reported only a selection of photos used for our analysis even if we bought more data.