Capturing a Sleeping Sun

Chart of early observations highlights two Maunder minima
Thursday, November 5, 2015

Three hundred years ago, the Sun began to wake up. For 70 years—from about 1645 to 1715—the Sun had been eerily quiet, with very few sunspots erupting on its surface.

Global-scale Observations of the Equatorial Ionization Anomaly

GOLD image of the daytime airglow and the equatorial ionization anomaly (EIA)
Monday, August 5, 2019

The NASA Global-scale Observations of the Limb and Disk (GOLD) ultraviolet spectrograph began imaging the Equatorial Ionization Anomaly (EIA), regions of the ionosphere with enhanced electron density north and south of the magnetic equator, in October 2018.

What the Sudden Death of Solar Cycles Can Tell us About the Nature of the Solar Interior

140 year record of solar filaments
Monday, July 1, 2019

We observe the abrupt end of solar activity cycles at the Sun’s Equator by combining almost 140 years of observations from ground and space.

Validation of Ionospheric Specifications During Geomagnetic Storms: TEC and foF2 during the 2013 March Storm Event

Multiple scatter plots of Geomagnetic storms
Wednesday, March 6, 2019

To address challenges of assessing capabilities of space weather modeling, the CCMC (Community Coordinated Modeling Center) is leading a newly established “International Forum for Space Weather Modeling Capabilities Assessment.”

On the variability of the semidiurnal solar and lunar tides of the equatorial electrojet (EEJ)

Plot showing EEJ obtained from Huancayo and Fuquene observatories
Friday, November 9, 2018

The variabilities of the semidiurnal solar and lunar tides of the equatorial electrojet (EEJ) are investigated during the 2003, 2006, 2009 and 2013 major sudden stratospheric warming (SSW) events in this study.

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.

Characterization of Cameras for the COSMO K-Coronagraph

Digital image sensors
Thursday, October 11, 2018

Digital image sensors are ubiquitous in astronomical instrumentation and it is well known that they suffer from issues that must be corrected for data to be scientifically useful.

Retrieving Global Wilson Currents from Electrified Clouds using Satellite Passive Microwave Observations

Global total TRMM current
Wednesday, October 3, 2018

Peterson et al. (2015) developed an algorithm for estimating the electric field vector at any point above an electrified cloud from passive microwave observations. 

Outreach and Observing at Mauna Loa in Hawaii

Lisa Waters demonstrating magnetic fields and effects on the sun

Educational outreach is an important and rewarding part of an observer’s job at the Mauna Loa Solar Observatory (MLSO) site located on the flanks of Mauna Loa Mountain at an elevation of 3440 meters in the U.S. state of Hawai’i.


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