Views of Mauna Loa Volcano during clear weather day and on day when...

These views of Mauna Loa are from near the Hawaiian Volcano Observatory looking toward the west. The view on left is typical during strong trade winds that blow the plume from Halema‘uma‘u Crater southwest of the summit area. The view on right is common during slack winds that allow vog conditions to develop in the summit area of Kīlauea. During such conditions, people should reduce their exposure to vog by limiting strenuous activities, remaining indoors, or leaving the area.