Coronal solar magnetism

About the Mauna Loa Solar Observatory

The Mauna Loa Solar Observatory (MLSO) occupies part of the NOAA Mauna Loa research site located on the flank of Mauna Loa at an elevation of 3440 meters on the island of Hawaii. It is operated by the High Altitude Observatory, a division of the National Center for Atmospheric Research, which is located in Boulder, Colorado.

UCoMP Instrument NEARING SCIENCE MISSION PHASE

UCoMP on MLSO spar

The Upgraded Coronal Multi-Channel Polarimeter (UCoMP) coronagraph was deployed to Mauna Loa Solar Observatory in 2021.

NSF Approves Funding for COSMO Next Stage

Story Date: 2020-12-03

COSMO Site and Design Advancement Updates

Recent NSF Funding for COSMO Site and Design Advancement (COSADA)

  • Final Design of COSMO Large Coronagraph (LC)
  • Site Survey

Magnetofrictional Modeling of an Erupting Pseudostreamer

3D magnetic eld evolution of an erupting pseudostreamer
Friday, August 13, 2021

In this study, we present a magnetic conguration of an erupting pseudostreamer observed on April 19, 2015 on the Southwest limb embedding a prominence cavity. The eruption resulted in a relatively wide CME with a round front and prominence core intersected by a sharp plume.

Reconstructing the Coronal Magnetic Field: The Role of Cross-Field Currents in Solution Uniqueness

Graphic image of analytic model magnetic field lines
Friday, October 23, 2020

We present a new 3D magnetohydrostatic (MHS) direct elliptic solver for extrapolating the coronal magnetic field from photospheric boundary conditions in a manner consistent with an assumed plasma distribution.

Global Maps of the Magnetic Field in the Solar Corona

Graphic image of magnetic field model

An international team led by solar physicists from Peking University, China and National Center for Atmospheric Research (NCAR), USA, has recently measured the global magnetic field of the solar corona for the first time.

Simulating the solar corona in the forbidden and permitted lines with forward modeling I: Saturated and unsaturated Hanle regimes

Graphic depicting Linear polarization azimuth
Thursday, October 3, 2019

The magnetic field in the corona is important for understanding solar activity. Linear polarization measurements inforbidden lines in the visible/IR provide information about coronal magnetic direction and topology.

MLSO Honors the Sun at AstroDay West

Radio dish

On October 6th, the MLSO staff participated in AstroDay 2018, an educational outreach event coordinated by the Mauna Kea Observatories. 3,000 people attended. This was the second occurrence of this event, located in Kailua-Kona, on the west side of Hawaii Island.

Coronal Magnetism

MLSO total eclipse, 1980 February 16, India
Monday, June 18, 2018

BC Low elaborates on the extraordinary sixty years of progress made to space observation of the Sun, solar wind, planets and their magnetospheres. He notes that space platforms complementing ground-based observatories have transformed solar physics.

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