This has to be the weirdest blessing from the Rituale Romanum:
22. BLESSING OF A SEISMOGRAPH
(Approved by the Congregation of Sacred Rites, Feb. 13, 1924)
P: Our help is in the name of the Lord.
All: Who made heaven and earth.
P: The Lord be with you.
All: May He also be with you.
Let us pray.
Almighty everlasting God, whose very gaze causes the earth to tremble, pour out your blessing + on this seismograph; and grant that the signs of the earth’s tremors may be precisely recorded by it, and then rightly interpreted by man, both for the benefit of your people and for the greater glory of your name; through Christ our Lord.
O Virgin Mary, in view of your own sorrows take pity on us and pray for us.
St. Emidius, pray for us, and in the name of Jesus Christ of Nazareth, protect us and also this seismograph from the terror of earthquakes.
It is sprinkled with holy water.
* * *
Tradition holds that Bishop Emygdius (Emidius), a convert pagan from Trier and elevated to the episcopate by Pope Marcellus I, having performed numerous miracles, was martyred under Emperor Diocletian.
The cult of Saint Emygdius is ancient, documented by churches dedicated to him since the eighth century. The translation of his relics from the catacomb of Sant’Emidio alla Grotte to the crypt of the cathedral happened probably around the year 1000 under Bernardo II, bishop of Ascoli.
In 1703, a violent earthquake occurred in the Marche but did not affect the city of Ascoli Piceno. The city’s salvation was attributed to St. Emygdius and he was thenceforth invoked against earthquakes.