Solar Transients and Space Weather - STSW

Catalogue of MLSO/MK4 White Light Cavities

Determining the state of the corona prior to coronal mass ejections (CMEs) is crucial to understanding and ultimately predicting solar eruptions. A common and compelling feature of CMEs is their three-part morphology as seen in white light observations of a bright expanding loop, followed by a relatively dark cavity, and lastly a bright core associated with an erupting prominence/filament.

Here is a catalogue providing detailed analysis of 98 white light cavities observed by MLSO's Mk4 coronameter:

A Complication to the "Coronal Seismology" Paradigm

Wednesday, December 1, 2010

Quasi-periodic propagating disturbances are frequently observed in coronal intensity image sequences.

The Community Spectro-polarimetric Analysis Center (CSAC)

CSAC provides a suite of community resource tools for analysis of the precision polarization data for remote sensing of magnetic fields in the outer solar atmosphere.

A different picture of the interior of the sun

Friday, September 5, 2014

New observational work provides more information about the evolution of the Sun's interior and origins of its enigmatic 11(-ish) solar cycle. The research potentially opens the door to improved forecasting of decadal-scale solar variability.


The FORWARD model is a suite of IDL and fortran codes that calculates simulated coronal polarization signals from numerical and analytical models of the corona.

Solar Transients and Space Weather

Overview and Research Goal

The Multi-Component Photospheric Magnetic Field

Stokes Polarization
Wednesday, February 5, 2014

The Spectro-Polarimeter aboard the Hinode spacecraft was developed jointly by HAO and the Lockheed Martin Solar and Astrophysics Laboratory. This instrument provides continuous, high resolution, high precision measurements of polarization of the Sun.

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.

Sunrise II Pre-launch Update

Sunrise II Gondola Photograph

On June 8, 2009 the Sunrise balloon-borne telescope was successfully launched from the Esrange Space Center in Kiruna, Sweden aboard the HAO-developed gondola.


Subscribe to RSS - Solar Transients and Space Weather - STSW