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Main navigation Contact Us Search HAO High Altitude Observatory Home About HAO News History of HAO People Visitor Program Partnerships Organizational Chart Strategic Plan External Advisory Committees Internal Advisory Committees Information for Staff/Visitors Computer Support Research Research Highlights Science Topics Strategic Working Groups Modeling Assimilative Mapping of Ionospheric Electrodynamics (AMIE) Coupled Magnetosphere Ionosphere Thermosphere Model (CMIT) Data-Optimized Coronal Field Model (DOCFM) FORWARD The GLobal airglOW Model (GLOW) Global Scale Wave Model (GSWM) Lyon-Fedder-Mobarry (LFM) code MURaM Sunspot Model Output TIEGCM WACCM-X Living With A Star Focus Team Observation Community Spectro-polarimetric Analysis Center COSMO Fabry-Perot Interferometers HAO Eclipses Mauna Loa Solar Observatory McIntosh Synoptic Map Archive NCAR Vacuum Tunnel Facility Solar Maximum Mission The Sun Today WindCube LFDI Education The Sun: A Pictorial Introduction Questions and Answers About the Sun Solar Physics Historical Timeline Famous Solar-Stellar Scientists Solar Astronomy in the Prehistoric Southwest Suggested Reading Additional Educational Resources News & Events News All Upcoming Events Past Events Search HAO Contact Us Observing and Modeling the Sun-Earth System What We Do Upcoming Events Colloquium : Currents in the Ionosphere: Examining Sources and their Coupling with the Thermosphere - May 15, 2024 Colloquium : Understanding the Evolution of CME Plasmas in the Solar Corona from EUV Spectroscopy and Charge State Composition - May 22, 2024 Colloquium : What controls the global morphology of planetary aurora? - Jul 24, 2024 Latest News HAO flew observers to MLSO to observe the Sun during the solar eclipse May 2, 2024 On April 8, 2024, the day of the total solar eclipse, HAO observers Ben Berkey (site manager) and Lisa Perez-Gonzalez flew by helicopter to the Mauna Loa Solar Observatory (MLSO) located at 11,200 feet on the north face of Mauna Loa to observe the Sun’s corona using the MLSO coronagraphs. They had to fly to the site since the road and power lines to Mauna Loa were destroyed by a volcanic eruption on Nov 27, 2022. A generator and battery packs supplied the observatory with the necessary power. Unfortunately, clouds prevented observations on April 8, but Ben and Lisa were able to return on April 9 to capture beautiful observations of the corona with both coronagraphs (see images in story). Chasing the IR Corona through Solar Eclipse Experiments Apr 16, 2024 The total solar eclipse on April 8, 2024, was a great opportunity for the team of HAO, NSO, and NOAA scientists and collaborators to travel to a location on the totality path with the goal of running unique science experiments. Using additional telescopes, binoculars, and outreach materials, we were able to capture the eclipse throughout its phases and share our passion with a very excited local crowd. New Book! The Problem of Coronal Heating: A Rosetta Stone for Electrodynamic Coupling in Cosmic Plasmas Mar 25, 2024 HAO is pleased to announce the publication of a new and timely book written for young and open-minded scientists just prior to the total eclipse over the USA in April. Senior scientist Philip Judge and co-author James A. Ionson ask why, 8 decades after Bengt Edlen published his seminal article, we still do not have a clear answer to one of the longest-lasting puzzles in all of astronomy. Why is the solar corona so hot? More NewsLatest Research Highlights Magnetic fields beneath active region coronal loops May 9, 2024 Philip Judge , Lucia Kleint, and Christoph Kuckein use measurements of photospheric and chromospheric magnetic fields from the GREGOR GRIS instrument, to refute the idea that magnetic reconnection of network magnetic fields with granular fields drives coronal heating. Exploring Spatial and Temporal Patterns in the Debrecen Solar Faculae Database Apr 11, 2024 Anett Elek, Marianna B. Korsós, Mausumi Dikpati , Norbert G. Gyenge, Bernadett Belucz, and Robertus Erdélyi, using data from the Debrecen Solar Faculae Database, investigated the spatiotemporal distribution of photospheric faculae between 2010 May 1 and 2014 December 31. Photospheric faculae are markers of the solar magnetic field, appearing as bright regions along the edges of granules on the Sun’s surface. Investigation of the physical mechanism of the formation and evolution of equatorial plasma bubbles during a moderate storm on September 17, 2021 Apr 10, 2024 Kun Wu, Liying Qian, Wenbin Wang, Xuguang Cai, Joseph M. Mclnerney investigate in detail the occurrence and evolution of ionospheric equatorial plasma bubbles (EPBs) during a moderate storm on September 17th, 2021, using Global-scale Observation of the Limb and Disk (GOLD) observations and Whole Atmosphere Community Climate Model-eXtended (WACCM-X) simulations. 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Box 3000, Boulder, CO 80307-3000 • Shipping Address: 3090 Center Green Drive, Boulder, CO 80301 This material is based upon work supported by the NSF National Center for Atmospheric Research, a major facility sponsored by the U.S. National Science Foundation and managed by the University Corporation for Atmospheric Research. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the National Science...