indeed, as this document indicates :
"DUE TO THE DEPTH OF THE EARTHQUAKE NO TSUNAMI IS EXPECTED."
The Depth of the subterranean earthquake is generally a major factor in Tsunami (The main factor being the displacement of the water mass above).
The last two M9~ magnitude earthquakes causing deadly tsunamis (Indian Ocean 2004, Japan 2011) were only at a Depth of 30km (19mi). This one is very deep, at 619km (385mi) below the surface.
The Depth of the subterranean earthquake is generally a major factor in Tsunami (The main factor being the displacement of the water mass above).
The last two M9~ magnitude earthquakes causing deadly tsunamis (Indian Ocean 2004, Japan 2011) were only at a Depth of 30km (19mi). This one is very deep, at 619km (385mi) below the surface.