Quakedle
Puzzle #55 was off the coast of Oregon.
Quakedle is an educational game. Event details and tsunami indicators must not be used for emergency decisions; follow official local authorities and current USGS notices.
USGS — Tectonic Plates of the Earth
How it scored
- Magnitude
- M5.3 — moderate class
- Magnitude type
- mww — W-phase moment magnitude
- Depth
- 10.0 km — shallow
- Region
- Cascadia and the Pacific Northwest
- Tsunami indicator
- USGS tsunami indicator set
- Felt reports
- 9 DYFI reports
- PAGER alert
- No PAGER alert color reported
- Tectonic plates
- Juan de Fuca Plate · North American Plate
- Tectonic context
- Offshore Cascadia is a subduction margin where the Juan de Fuca Plate descends beneath North America; shallow crustal faults also occur inland.
Also on the record
- USGS reports magnitude M5.3. Which standard descriptive class contains it?
- Moderate (M5.0–5.9)
- The hypocentral depth is 10.0 km. Which depth band is it in?
- Shallow (less than 70 km)
- USGS locates the event at “off the coast of Oregon”. Which broad authored region matches?
- Cascadia and the Pacific Northwest
- What does the USGS tsunami indicator say for this event?
- Yes — the USGS event record has its tsunami indicator set.
- The event uses magnitude type “mww”. What does that code mean?
- Mww — W-phase moment magnitude