May 16, 2018: Onset of summit explosions and ash plumes. May 11, 2018: Most of the park closes. May 10, 2018: Halema‘uma‘u lava lake drains. USGS scientists anticipate explosive events at the summit to begin in a few days. May 7: The park reopens. May 4-6, 2018: The park is closed to assess damage from the earthquake on May 4.