The 150-Foot Solar Tower at Mt. Wilson Observatory
. . . observing the Sun every clear day since 1912.
This page last updated on Wed Oct 26 12:04:03 PDT 2022
Observatory weather: cirrus; winds calm; 41° F.
Most current magnetograph data: 8-Nov-2011
Magnetogram Dopplergram Intensitygram*
Click for larger image of Fe magnetogram Click for larger image of Fe dopplergram Click for larger image of Fe intensitygram 5250.2Å
Fe I
Click for larger image of Na magnetogram Click for larger image of Na dopplergram Click for larger image of Na intensitygram 5895.9Å
Na I (D1)
Mt. Wilson 150-Foot Tower Data Images
*5250 intensity: 5250/5237 ratiogram
[Click to view a larger image of Solar Tower]


The 150-foot solar tower is operated by the
Division of Astronomy and Astrophysics at UCLA
with support from
The Mount Wilson Institute
Most current visual sunspot observation: 26-Oct-2022
Click for larger image of sunspot drawing
E---Mt. Wilson Sunspot Drawing---W
MPSI data from the most recently reduced observation(s):
For 5 observations taken on 11-08-11:
Average MPSI = 2.6285; Average MWSI = 0.9755
Solar Activity Plots, MPSI - MWSI
Click for larger MPSI plot and other data plots
Supersynoptic chart showing solar magnetic fields 1986-2007
Magnetic field plot.
(Click on image for an explanation and more plots.)
150-Foot Solar Tower Towercam
(Click on Camera)
Click for current Towercam Image!
NOAA Southern California visible satellite image:
(Click on Image)
[Click for most current visible satellite image from NOAA]

Available Archived Data:
[*] Magnetograph Image Archive - FTP
[*] Magnetograph FITS Archive - FTP
[*] Dopplergraph FITS Archive - FTP
[*] Solar Synoptic Maps - FTP
[*] Daily Sunspot Drawing Archive - FTP
[*] Solar Photographic Archive Digitization Project
[*] Photoheliogram (Directs) Logbook Archive, 1908-2000
[*] Spectroheliograph Logbook Archive, 1915-1985
[*] Solar Magnetic Movies
[*] Sunspot Plots
[*] Monthly Sunspot Reports
[*] Updated Archive Data with Plots
[*] Recent publications by the Solar Group
[*] Data Release Statement

150-Foot Solar Tower Information:
[*] Telescope Information
[*] Magnetograph Information
[*] A Short History of the 150-Foot Solar Tower
[*] 150-Foot Solar Tower Photo Scrapbook
[*] Staff and Personnel
[*] Maps to Mt. Wilson Observatory
Related Sites:
[*] Solar Physics at UCLA
[*] UCLA Division of Astronomy & Astrophysics
[*] Mount Wilson Observatory Homepage - Mount Wilson Institute
[*] Mount Wilson Observatory 60-Foot Solar Tower - USC
[*] Historical Sunspot Drawing Resource Page
[*] Collection of Solar Links
Questions, comments, or suggestions?
or mail: 150-Foot Solar Tower
Mt. Wilson Observatory
Mt. Wilson, CA 91023

Page content and all images © 2003 The Regents of the University of California. All rights reserved.