Solar eclipse of April 28, 1930

A total solar eclipse occurred at the Moon's ascending node of orbit on Monday, April 28, 1930, with a magnitude of 1.0003. It was a hybrid event, with only a fraction of its path as total, and longer sections at the start and end as an annular eclipse. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. A total solar eclipse occurs when the Moon's apparent diameter is larger than the Sun's, blocking all direct sunlight, turning day into darkness. Totality occurs in a narrow path across Earth's surface, with the partial solar eclipse visible over a surrounding region thousands of kilometres wide.

The path of totality crossed the eastern Pacific Ocean, northwestern United States, central and eastern Canada, and northern Labrador of the Dominion of Newfoundland (today's Newfoundland and Labrador in Canada).

Observations
During a hybrid solar eclipse, the apex of the moon's umbral cone was very close to the Earth's surface, and the magnitude was very large. The edges of the moon and the sun were very close to each other as seen from the Earth in both the total and annular portion of the path. A series of Baily's beads on the lunar limb provided an excellent opportunity to measure the size and shape of the Earth, as well as the mountains and valleys on the lunar limb. Scientists recorded the precise time of each phase of the eclipse in Camptonville, California. Because the duration of totality was just more than 1 second, the photographic film needed to be inserted quickly after the start of totality. In addition, scientists recorded audio images with a long-wave receiver on an aircraft at the Mare Island Naval Shipyard. Each image had a time accurate to 1/5 second.

Prior to it, the hybrid solar eclipse of April 17, 1912, also belonging to Solar Saros 137, also occurred with a magnitude close to 1. Observations were made near Paris, France. Similar observations were also made during the annular solar eclipses of May 9, 1948 in Rebun Island, Japan and May 20, 1966 in Greece and Turkey, also belonging to the same solar Saros cycle.

Eclipses in 1930

 * A partial lunar eclipse on April 13, 1930.
 * A hybrid solar eclipse on April 28, 1930.
 * A partial lunar eclipse on October 7, 1930.
 * A total solar eclipse on October 21, 1930.

Metonic

 * Preceded by: Solar eclipse of July 9, 1926
 * Followed by: Solar eclipse of February 14, 1934

Tzolkinex

 * Preceded by: Solar eclipse of March 17, 1923
 * Followed by: Solar eclipse of June 8, 1937

Half-Saros

 * Preceded by: Lunar eclipse of April 22, 1921
 * Followed by: Lunar eclipse of May 3, 1939

Tritos

 * Preceded by: Solar eclipse of May 29, 1919
 * Followed by: Solar eclipse of March 27, 1941

Solar Saros 137

 * Preceded by: Solar eclipse of April 17, 1912
 * Followed by: Solar eclipse of May 9, 1948

Inex

 * Preceded by: Solar eclipse of May 18, 1901
 * Followed by: Solar eclipse of April 8, 1959

Triad

 * Preceded by: Solar eclipse of June 27, 1843
 * Followed by: Solar eclipse of February 26, 2017