Quakedle
Puzzle #65 was 165 km W of Nikolski, Alaska.
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
- M6.5 — strong class
- Magnitude type
- mww — W-phase moment magnitude
- Depth
- 111.7 km — intermediate
- Region
- Alaska and the Aleutians
- Tsunami indicator
- USGS tsunami indicator set
- Felt reports
- 8 DYFI reports
- PAGER alert
- green PAGER alert
- Tectonic plates
- Pacific Plate · North American Plate
- Tectonic context
- The Aleutian arc marks Pacific Plate subduction beneath the North American Plate; inland Alaska also contains major crustal faults.
Also on the record
- USGS reports magnitude M6.5. Which standard descriptive class contains it?
- Strong (M6.0–6.9)
- The hypocentral depth is 111.7 km. Which depth band is it in?
- Intermediate (70–300 km)
- USGS locates the event at “165 km W of Nikolski, Alaska”. Which broad authored region matches?
- Alaska and the Aleutians
- What does the USGS tsunami indicator say for this event?
- Yes — the USGS event record has its tsunami indicator set.
- Is this the largest earthquake in the supplied USGS week comparison?
- Yes — it is the largest or tied for largest in the supplied week.