Archdiocese of Santa Fe marks 80th anniversary of first nuclear bomb detonation

A nuclear explosion. / Credit: Sergey Nivens/Shutterstock

Washington, D.C. Newsroom, Jul 15, 2025 / 15:58 pm (CNA).

The Archdiocese of Santa Fe is calling on churches across the nation to mark the “somber milestone” of the 80th anniversary of the detonation of the first nuclear bomb, which took place in New Mexico in 1945.

The detonation of the Trinity explosion in the Jornada del Muerto desert, part of the Alamogordo Bombing Range, occurred at 5:29 a.m on July 16, 1945. In a statement released July 14, Archbishop John C. Wester of Santa Fe invited churches to ring their bells at that time this Wednesday, July 16, “as a call to prayer for peace and nuclear disarmament” and to remember “humanity’s entry into the atomic age.” 

To commemorate the anniversary, the archbishop, along with Bishop Peter Baldacchino of Las Cruces and Bishop James Wall of Gallup, “will gather with select faith and lay leaders at the Trinity test site for a private prayer and meditation service.”

“Together, they will pray for the end of the wars that plague our world and to protect us from the ongoing threat of nuclear devastation,” the archdiocese said.

The Trinity explosion was felt within a 160-mile radius that covered an area populated by about 500,000 people, most of whom were Latino or Native Americans.

Those near the test area reported that they did not receive warnings about the detrimental effects of the nuclear explosion, which took place just a few miles from their homes. Following the detonation, nearby residents reported a surge in cancer cases, an increase in infant deaths, and other health issues related to contamination and radiation.

“Additionally, clergy are encouraged to include prayers for peace and the elimination of nuclear weapons in the prayers of the faithful during the Mass of the day, celebrated in honor of the feast day of Our Lady of Mount Carmel, a significant Marian feast in the Catholic Church.”

The archdiocese stated that it “is fitting to seek Our Lady’s intercession for peace, protection from the threats of war and nuclear weapons, and for the conversion of hearts away from violence.”

“As the mother of Christ, the prince of peace, invoking her aid on this feast emphasizes the Catholic Church’s hope for a world free from the peril of nuclear conflict.”

On July 13, the archdiocese held an interfaith vigil in Albuquerque with a number of groups calling for the abolition of nuclear weapons worldwide.

At the event, Wester called Pope Francis‘ statement that nuclear weapons are immoral “groundbreaking” and asked the faithful to “to speak the truth” on the matter.