Google Maps and Solar Eclipse Paths: 1921 - 1940

Fred Espenak

The table below is a concise summary of all total, annular and hybrid solar eclipses from 1921 through 1940 (excluding partial eclipses). The links in the table provide additional information and graphics for each eclipse. In particular, the Eclipse Type (third column) links to dynamic maps showing the central path of eclipses across Earth's surface. These interactive maps utilize NASA eclipse path predictions and the plotting capabilities of Google Maps. The northern and southern limits of each eclipse path are plotted in blue while the central line is red. The yellow lines plotted across the path indicate the position of maximum eclipse at 10-minute intervals. You can zoom into the map and turn the satellite view on or off. When you click on a position, the eclipse times and circumstances at that location are calculated and displayed.

The first column in the table gives the Calendar Date of the instant of greatest eclipse[1]. This links to an orthographic projection map of Earth showing the region of visibility for an eclipse. The path of the Moon's penumbral shadow (cyan and magenta) covers the region of partial eclipse. The track of the umbral/antumbral shadow (blue/red) defines the path of total or annular eclipse. These figures are described in greater detail in the Key to Solar Eclipse Maps. Each figure is stored as a gif of approximately 60 kilobytes.

The second column TD of Greatest Eclipse is the Terrestrial Dynamical Time when the axis of the Moon's shadow passes closest to Earth's center. Animations of the Moon's penumbral and umbral shadows across Earth are accessed by clicking the this link. Each animated GIF file is from 40 KB to 175 KB in size.

The Eclipse Type (column 3) is either Total, Annular or Hybrid[2]. The link opens a window with the central eclipse path plotted on an interactive Google Map.

The Central Eclipse Class (column 4) indicates whether an eclipse is central or non-central. The parameters N and S identify paths that have no northern or southern limit, respectively. The link opens a table containing the central path coordinates.

Eclipses recur over the Saros cycle, a period of approximately 18 years 11 days. The Saros series that an eclipse belongs to is found in column 5. All eclipses in a particular Saros series can be viewed in a table via the Saros number link.

The parameter Gamma (column 6) is the perpendicular distance of the Moon's shadow axis and Earth's center at greatest eclipse. The link opens a table containing the Besselian elements for the eclipse.

The Eclipse Magnitude[3] (column 7) gives the fraction of the Sun's diameter obscured at the instant of greatest eclipse. The Path Width (column 8) gives the width of the central eclipse path (in kilometers) at the instant of greatest eclipse. The Central Duration[4] (column 9) gives the length of the eclipse as seen from the central line at greatest eclipse.

The Key to Solar Eclipse Path Tables contains a more detailed description of each item in the table.

For more data on solar eclipses during this period, see Catalog of Solar Eclipses: 1901 to 2000 .

Solar Eclipse Paths: 1921 - 1940
Calendar Date TD of Greatest Eclipse Eclipse Type Central Eclipse Class Saros Series Gamma Eclipse Magnitude Path Width (km) Central Duration
(Link to Global Map) (Link to Animation) (Link to Google Map) (Link to Path Table) (Link to Saros) (Link to Besselian Elements)
1921 Apr 08 09:15:01 Annular central 118 0.8869 0.975 191.5 01m50s
1921 Oct 01 12:35:58 Total central 123 -0.9383 1.029 290.6 01m52s
1922 Mar 28 13:05:26 Annular central 128 0.1711 0.938 233.1 07m50s
1922 Sep 21 04:40:31 Total central 133 -0.2130 1.068 226.2 05m59s
1923 Mar 17 12:44:58 Annular central 138 -0.5438 0.931 305.2 07m51s
1923 Sep 10 20:47:29 Total central 143 0.5149 1.043 166.9 03m37s
1925 Jan 24 14:54:03 Total central 120 0.8661 1.030 206.4 02m32s
1925 Jul 20 21:48:42 Annular central 125 -0.7193 0.944 299.6 07m15s
1926 Jan 14 06:36:58 Total central 130 0.1973 1.043 146.6 04m11s
1926 Jul 09 23:06:02 Annular central 135 0.0538 0.968 115.4 03m51s
1927 Jan 03 20:22:53 Annular central 140 -0.4956 0.999 2.1 00m03s
1927 Jun 29 06:23:27 Total central 145 0.8163 1.013 76.7 00m50s
1928 May 19 13:24:20 Total non-central (S) 117 -1.0048 1.014 - -
1929 May 09 06:10:34 Total central 127 -0.2887 1.056 193.0 05m07s
1929 Nov 01 12:05:10 Annular central 132 0.3514 0.965 134.5 03m54s
1930 Apr 28 19:03:34 Hybrid central 137 0.4730 1.000 1.0 00m01s
1930 Oct 21 21:43:53 Total central 142 -0.3804 1.023 84.3 01m55s
1932 Mar 07 07:55:50 Annular central 119 -0.9673 0.928 1083.1 05m19s
1932 Aug 31 20:03:41 Total central 124 0.8307 1.026 154.6 01m45s
1933 Feb 24 12:46:39 Annular central 129 -0.2191 0.984 57.5 01m32s
1933 Aug 21 05:49:11 Annular central 134 0.0869 0.980 71.0 02m04s
1934 Feb 14 00:38:41 Total central 139 0.4868 1.032 122.8 02m53s
1934 Aug 10 08:37:48 Annular central 144 -0.6890 0.944 280.3 06m33s
1935 Dec 25 17:59:52 Annular central 121 -0.9228 0.975 234.5 01m30s
1936 Jun 19 05:20:31 Total central 126 0.5389 1.033 132.1 02m31s
1936 Dec 13 23:28:12 Annular central 131 -0.2493 0.935 250.7 07m25s
1937 Jun 08 20:41:02 Total central 136 -0.2253 1.075 249.8 07m04s
1937 Dec 02 23:05:45 Annular central 141 0.4389 0.918 344.4 12m00s
1938 May 29 13:50:19 Total central 146 -0.9607 1.055 674.8 04m05s
1939 Apr 19 16:45:53 Annular central 118 0.9388 0.973 285.0 01m49s
1939 Oct 12 20:40:23 Total central 123 -0.9737 1.027 417.7 01m32s
1940 Apr 07 20:21:21 Annular central 128 0.2190 0.939 230.0 07m30s
1940 Oct 01 12:44:06 Total central 133 -0.2573 1.064 218.0 05m35s

Central Eclipse Class abbreviations (used above):
N = no northern limit, S = no southern limit, AT = annular-total hybrid, TA = total-annular hybrid


[1] Greatest Eclipse is the instant when the distance between the Moon's shadow axis and Earth's center reaches a minimum.

[2] Hybrid eclipses are also known as annular/total eclipses. Such an eclipse is both total and annular along different sections of its umbral path.

[3] Eclipse magnitude is the fraction of the Sun's diameter obscured by the Moon. For annular eclipses, the eclipse magnitude is always less than 1. For total eclipses, the eclipse magnitude is always greater than or equal to 1. For both annular and total eclipses, the value listed is actually the ratio of diameters between the Moon and the Sun.

[4] Central Duration is the duration of a total or annular eclipse at greatest eclipse. This is the instant when the axis of the Moon's shadow passes closest to Earth's center.


Twenty Year Solar Eclipse Path Tables (w/Google Maps)

Each of the following links displays a table containing 20 years of total, annular and hybrid eclipses. Each eclipse offers links to a global map, shadow animation, interactive Google map, path coordinates table, and saros table.

Twenty Year Solar Eclipse Path Tables (w/Google Maps)
Years
1901-1920 1921-1940 1941-1960 1961-1980 1981-2000
2001-2020 2021-2040 2041-2060 2061-2080 2081-2100

Decade Tables of Solar Eclipses

Each link in the following table displays a page containing 10 years of eclipses. Every eclipse has links of global maps, interactive Google maps, animations, path coordinate tables, and saros tables.

Decade Tables of Solar Eclipses
Decades
1901-1910 1911-1920 1921-1930 1931-1940 1941-1950
1951-1960 1961-1970 1971-1980 1981-1990 1991-2000
2001-2010 2011-2020 2021-2030 2031-2040 2041-2050
2051-2060 2061-2070 2071-2080 2081-2090 2091-2100

Maps of Solar Eclipse Paths

Solar Eclipse Catalogs

Reproduction of Eclipse Data

All eclipse calculations are by Fred Espenak, and he assumes full responsibility for their accuracy. Some of the information presented on this web site is based on data originally published in:

Fifty Year Canon of Solar Eclipses: 1986 - 2035
and
Five Millennium Canon of Solar Eclipses: -1999 to +3000 (2000 BCE to 3000 CE)

Permission is freely granted to reproduce this data when accompanied by an acknowledgment:

"Eclipse Predictions by Fred Espenak, NASA's GSFC"

For more information, see: NASA Copyright Information

2013 Dec 09