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Moderate mag. 4.4 earthquake - 6.2 mi northeast of Lima, Beaverhead County, Montana, USA, on 2019-04-09 11:08:46 -07:00

Moderate mag. 4.4 earthquake - 6.2 mi northeast of Lima, Beaverhead County, Montana, USA, on 2019-04-09 11:08:46 -07:00 Moderate mag. 4.4 earthquake - 6.2 mi northeast of Lima, Beaverhead County, Montana, USA, on 2019-04-09 11:08:46 -07:00

Moderate magnitude 4.4 earthquake at 11 km depth

9 Apr 18:38 UTC: First to report: USGS after 30 minutes.
Apr 9 18:46: Magnitude recalculated from 5.0 to 4.4.
Hypocenter depth recalculated from 10.3 to 10.1 km.
Hypocenter depth recalculated from 10.1 to 11.3 km.

Earthquake details

Date & timeApr 9, 2019 18:08:46 UTC
Local time at epicenter2019-04-09 11:08:46 -07:00
StatusConfirmed
Magnitude4.4
Depth11.3 km
Epicenter latitude / longitude44.6928°N / 112.4931°W (Beaverhead, Montana, United States)
Antipode44.693°S / 67.507°E
Shaking intensityWeak shaking
Felt8 reports
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoHell's Half Acre (134 km / 83 mi)
Nearby towns and cities10 km (6 mi) NE of Lima (Beaverhead County) (pop: 222) | Show on map | Quakes nearby
59 km (37 mi) SSE of Dillon (pop: 4,210) | Show on map | Quakes nearby
112 km (69 mi) NNW of Rexburg (Madison County, Idaho) (pop: 27,700) | Show on map | Quakes nearby
135 km (84 mi) S of Butte-Silver Bow (Balance) (pop: 33,500) | Show on map | Quakes nearby
141 km (88 mi) NNW of Idaho Falls (pop: 59,200) | Show on map | Quakes nearby
142 km (88 mi) NNW of Ammon (Bonneville County, Idaho) (pop: 15,000) | Show on map | Quakes nearby
146 km (91 mi) S of Butte (pop: 34,200) | Show on map | Quakes nearby
158 km (98 mi) SW of Bozeman (pop: 43,400) | Show on map | Quakes nearby
163 km (102 mi) SSE of Anaconda (Deer Lodge County) (pop: 9,420) | Show on map | Quakes nearby
203 km (126 mi) N of Pocatello (Idaho) (pop: 54,400) | Show on map | Quakes nearby
Estimated seismic energy released2.5 x 1011 joules (69.8 megawatt hours, equivalent to 60 tons of TNT) | about seismic energy
Show interactive Map
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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.
Mag.DepthLocationSource
4.411 km10km NE of Lima, Montana (USA)USGS
5.010 kmWestern Montana (USA)EMSC

Seismograms

Seismic station: Black Hills, South Dakota, USA (RSSD/IU network) | Distance from quake: 674 km / 419 mi | Show on map | Station Info
Seismic station Black Hills, South Dakota, USA: vertical movement plot around time of quake (source: IRIS/BUD)
Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Source: IRIS Buffer of Uniform Data (BUD) webtool
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User reports for this quake (9)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Nampa, Id / Very weak shaking (MMI II) : I was sitting on my sofa working and could feel a VERY light tremor that lasted about 30 seconds.  
Flat Rock / Weak shaking (MMI III)
Hamilton, MT (215.7 km NW of epicenter) [Map] / Very weak shaking (MMI II) : One light wobble while sitting in my office chair  
30 km of West Yellowstone, Gallatin, Montana (81.7 km E of epicenter) [Map] / Light shaking (MMI IV) : It felt like a strong gust of wind rocked my RV for about 4 seconds. The second shaking a couple of minutes later lasted a couple of seconds and not quite as strong.  
Hamilton, MT (202.7 km NW of epicenter) [Map] / Very weak shaking (MMI II) : Our office building creaked and the door rattled.  
31 km of Salmon, Lemhi, Idaho (118 km W of epicenter) [Map] / Light shaking (MMI IV) : Heard a rumble and then it was shaking. It got smaller, but kept shaking for a few more seconds. (reported through our app)  
Dillon, Beaverhead, Montana (58.8 km NNW of epicenter) [Map] / Light shaking (MMI IV) : My computers, desk, and chair were all shaking. Also heard a low rumble  
Moore, Idaho (127.3 km SSW of epicenter) [Map] / Light shaking (MMI IV) : I was laying awake in my bed and I felt a light shaking, up and down not so much side to side. I got up to check the time, on our stove it said 12:08 the stove is 2 minutes slow from the time on the phone. My wife who was sitting on the couch said "Did yo  
unspecified (334.5 km NNW of epicenter) [Map] / not felt (reported through our app)

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