Quakedle
Puzzle #42 was 4 km SW of Salcha, 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
- M5.3 — moderate class
- Magnitude type
- mww — W-phase moment magnitude
- Depth
- 10.5 km — shallow
- Region
- Alaska and the Aleutians
- Tsunami indicator
- USGS tsunami indicator set
- Felt reports
- 1,447 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 M5.3. Which standard descriptive class contains it?
- Moderate (M5.0–5.9)
- The hypocentral depth is 10.5 km. Which depth band is it in?
- Shallow (less than 70 km)
- USGS locates the event at “4 km SW of Salcha, 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.
- USGS received 1,447 “Did You Feel It?” reports. Which band is that?
- Very widely felt (1,000+)