"Around 150 to 200 fiber-optic cable breaks are recorded each year. Between 65% and 75% occur in water depths of < 200 m and result mainly from fishing and shipping activities. In contrast, breaks attributed to geohazards comprise < 10% of the world average. However, seaward of the busy continental shelf and upper continental slope, geohazards account for at least one-third of breaks."
-- "Insights into Submarine Geohazards from Breaks in Subsea Telecommunication Cables"
"Around 150 to 200 fiber-optic cable breaks are recorded each year. Between 65% and 75% occur in water depths of < 200 m and result mainly from fishing and shipping activities. In contrast, breaks attributed to geohazards comprise < 10% of the world average. However, seaward of the busy continental shelf and upper continental slope, geohazards account for at least one-third of breaks."
-- "Insights into Submarine Geohazards from Breaks in Subsea Telecommunication Cables"
PDF: https://www.iscpc.org/documents/?id=1794