In what month and year did Alamitos Number 1 discover Signal Hill?

• A. May 1920
• B. June 1921
• C. July 1923
• D. June 1922

Answer: (B)

The moment Alamitos No. 1 struck oil at Signal Hill is the turning point being tested, because it marks the discovery of the Signal Hill oil field and kicked off a major oil boom in the Southern California region. That event is historically dated to June 1921, making this the correct month and year. The other dates don’t align with the established record of when the discovery occurred, since they would place the breakthrough either before drilling was completed or after the initial discovery. So the June 1921 date best fits the actual history of Alamitos No. 1 and Signal Hill.