Solar Minimum

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.

NASA's Parker Solar Probe Teams Up With MLSO and WHPI

Graphic image of NASA's Parker Solar Probe

NASA released a story about the The Whole Heliosphere and Planetary Interactions (WHPI) campaign that took place in coordination with Parker Solar Probe’s fourth perihelion.

Thermal Properties of Coronal Cavities

Graph depicting temperature of cavities and surrounding streamers
Tuesday, March 31, 2020

We have analyzed 33 cavities observed between 2012 and 2018, from solar activity maximum to minimum. For each cavity we applied a differential emission measure method to obtain both a temperature distribution and a value of the average temperature.

Development and Validation of the Whole Atmosphere Community Climate Model with Thermosphere and Ionosphere Extension (WACCM-X)

 WACCM-X simulations image
Wednesday, February 14, 2018

H.Liu et al. have improved a comprehensive numerical model, the Whole Atmosphere Community Climate Model with thermosphere and ionosphere extension (WACCM-X).

Welcome Bidya Binay Karak!

Portrait of Bidya Binay Karak

Bidya is no stranger to solar dynamo modeling. He earned his PhD in 2013 under the direction of Arnab Choudhuri at the Indian Institute of Science (IISc) in Bangalore.

Whole Heliosphere Interval (WHI)

Sunday, January 1, 2012

The December, 2011 issue of Solar Physics was a Topical Issue on the Sun-Earth Connection near Solar Minimum.

Long-Term Solar Variability

Overview and Research Goal

Solar Maximum Mission Coronagraph

This will be the SMM instrument page.


Observing the Quiet Sun: A Weak Cycle Offers Opportunity for Expanding Solar Understanding

Observing the Quiet Sun

Since the dawn of the Space Age in the 1950s, solar maxima have coincided with strong upticks in sunspot activity but the current cycle, Cycle 24, which was expected to peak in Spring of 2013, has been unusually quiet.

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