At 3:00 am (Hawaii Time) on Wednesday, there was a minor explosion at the site depicted in foto #4, caused by a build-up of gases in the magma chamber underneath the caldera. Rocks, some 1 meter across, were tossed out of Halemaumau crater onto the caldera floor, including a parking lot that sits beside the crater. The road to the observatory has now been closed and I was unable to get any shots of the spot of the explosion, and these shots were taken from the same place as foto #1, i. e., Volcano House. On the right side of this foto you can see the slopes of Mauna Loa, the world’s largest mountain. In the foreground is Byron’s Ledge, which is a forested ledge inside the caldera.