This is a mosaic constructed from of Landsat MultiSpectral Scanner (MSS) images of the Big Island of Hawai'i.
The projection to the north is Kohala, an oval shield volcano built around two rift zones that trend northwestward and southeastward from its summit region where the top of the highest cone is 1,644 meters above sea level.
Lava from Mauna Kea overlays part of Kohala. The summit of Mauna Kea, the highest point in the state, and the site of several important astronomy observatories, can be seen as the dark oval shape about one third of the way from the top of the picture, towards the middle of the island. Late stage volcanism has produced a cap of differentiaed lavas that almost completely bury the original shield volcano.
The Hualalai volcano forms the western bulge (cloud-covered in this image) which appears to stick out of the west side of the island. Lava from Mauna Kea and Mauna overlay parts of Hualalai.
Mauna Loa is the largest volcano making up the Big Island, its summit is within the large dark area to the southwest of Mauna Kea. Mauna Loa covers an older volcano, no longer visible, called Ninole. Mauna Loa has continued to erupt through the 19th and 20th centuries.
Currently in eruption for the past 12 years is Kilauea, forming the southeast portion of the Big Island. The image clearly shows how recent lava flows down the mountain and into the sea.
Copyright by P. Mouginis-Mark