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Light mag. 4.1 earthquake - 40 Km N of Valdez, Alaska (USA) on Sunday, 13 September 2020

Light mag. 4.1 earthquake  - 40 Km N of Valdez, Alaska (USA) on Sunday, 13 September 2020
13 Sep 15:15 UTC: First to report: EMSC after 6 minutes.
13 Sep 15:15: Now using data updates from USGS
... [show all] ...
13 Sep 15:33: Magnitude recalculated from 4.3 to 4.1. Hypocenter depth recalculated from 21.6 to 31.7 km (from 13.4 to 19.7 mi). Epicenter location corrected by 2.4 km (1.5 mi) towards NE.
Date & time: Sunday, 13 September 2020 15:10 UTC
Magnitude: 4.1
Depth: 31.7 km
Epicenter latitude / longitude: 61.4924°N / 146.3972°W (Alaska, United States)
Nearest volcano: Wrangell (140 km / 87 mi)
Nearby towns and cities:
40 km (25 mi) N of Valdez (pop: 3,900)
59 km (37 mi) SE of Nelchina (pop: 100)
67 km (42 mi) SW of Tonsina (pop: 100)
170 km (106 mi) E of Eagle River (pop: 24,800)
170 km (106 mi) E of Knik-Fairview (pop: 14,900)
189 km (118 mi) E of Anchorage (pop: 298,700)
Primary data source: USGS
Estimated released energy: 8.9 x 1010 joules (24.8 megawatt hours, equivalent to 21.3 tons of TNT) [learn more]
If you felt this quake (or if you were near the epicenter), please share your experience and submit a short "I felt it" report! Other users would love to hear about it!
Also if you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable also to earthquake science and earthquake hazard analysis and mitigation efforts. You can use your device location or the map to indicate where you were during the earthquake. Thank you!

Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
TimeMag. / DepthLocationSource
Sun, 13 Sep 15:10 UTCM 4.1 / 31.7 km40 Km N of Valdez, Alaska (USA)USGS
Sun, 13 Sep 15:10 UTCM 4.1 / 32 kmSouthern Alaska (USA)EMSC

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Leave a comment if you find a particular report interesting or want to add to it.
Flag as inappropriate.
Mark as helpful or interesting.
Send your own user report!
154.3 km W of epicenter [Map] / Very weak shaking (MMI II) / 1-2 s (reported through our app)
155 km W of epicenter [Map] / Weak shaking (MMI III) (reported through our app)
194.6 km W of epicenter [Map] / Very weak shaking (MMI II) / very short (reported through our app)
Anchorage, Alaska (182 km W of epicenter) [Map] / Very weak shaking (MMI II) (reported through our app)
Valdez, AK (38.7 km S of epicenter) [Map] / Very weak shaking (MMI II) / rattling, vibrating / 5-10 s
147 km W of epicenter [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s
Wasilla (155.7 km W of epicenter) [Map] / Light shaking (MMI IV) (reported through our app)
Valdez / Moderate shaking (MMI V) / 1-2 s : A couple moderate jolts. I was in Anchorage Alaska during 1964 quake. This no comparison but they always scare me | 2 users found this interesting.
Palmer Alaska / Light shaking (MMI IV) / 2-5 s
Palmer Alaska / Very weak shaking (MMI II) / single lateral shake / very short
Valdez, Alaska / Light shaking (MMI IV) / rattling, vibrating / 2-5 s
Palmer Alaska / Light shaking (MMI IV) : Woke me up. Good light shake.

Significant earlier earthquakes in the same area since 1900

Light mag. 4.1 earthquake - 40 Km N of Valdez, Alaska (USA) on Sunday, 13 September 2020

Map of earlier quakes


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