Mauna Loa Solar Observatory

Mauna Loa Solar Observatory is a Solar Observatory on Mauna Loa in Hawaii. It is operated by High Altitude Observatory (HAO), a unit of NCAR (National Center for Atmospheric Research). The unit's focus is solar phenomena that affect Earth, i.e., space weather. Instruments:

• K-Cor (coronagraph).
• UCOMP (upgraded CoMP)

Former instruments:

• CoMP (Coronal Multi-cannel Polarimeter).
• PSPT (Precision Solar Photometric Telescope).
• Mk4 (Mark-IV K-Coronameter).
• ACOS (Advanced Coronal Observing System).
• CS60 (Coronado Solarmax 60).
• CHIP (Chromospheric Helium-I Imaging Photometer).
• PICS (Polarimeter for Inner Coronal Studies).
• DPM (Digital Prominence Monitor).
• POM (Prominence Monitor)
• Mk3 (Mark-III K-Coronameter).
• Mk2 (Mark-II K-Coronameter).
• Mk1 (Mark-I K-Coronameter).

Coronal Solar Magnetism Observatory (COSMO) is a plan for three new instruments, one of which is completed (K-Cor).

Note that a November 2022 Mauna Loa eruption took MLSO out of service, blocking power and access roads; lava still too hot for construction has resulted in an extended outage and as of 2024, a new access road is scheduled for completion at the end of the year.