Neapolitans hold their breath on the Feast of the great patron San Gennaro, St. Januarius. There is a relic of dry blood which, as the Cardinal Archbishop moves the reliquary, liqufies and visibly flows again. When it doesn’t… bad things happen, such as earthquakes.
This year, just hours ago, the blood of San Gennaro liquified again.
Here is a video:
A news account with photos HERE
St. Alphonus de Liguori wrote in Victory of the Martyrs:
The Neapolitans honor this saint as the principal patron of their city and nation, and the Lord himself has continued to honor him, by allowing many miracles to be wrought through his intercession, particularly when the frightful eruptions of Mount Vesuvius have threatened the city of Naples with utter destruction. While the relics of St. Januarius were being brought in procession towards this terrific volcano, the torrents of lava and liquid fire which it emitted have ceased, or turned their course from the city. But the most stupendous miracle, and that which is greatly celebrated in the church, is the liquefying and boiling up of this blessed martyr’s blood whenever the vials are brought in sight of his head. This miracle is renewed many times in the year, in presence of all who desire to witness it; yet some heretics have endeavored to throw a doubt upon its genuineness, by frivolous and incoherent explanations; but no one can deny the effect to be miraculous, unless he be prepared to question the evidence of his senses.
A better video, but from last year: