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Light mag. 3.3 earthquake - 57 km south of Ottawa, Ontario, Canada, on Saturday, Mar 13, 2021 at 7:50 pm (GMT -5)

Light mag. 3.3 earthquake - 57 km south of Ottawa, Ontario, Canada, on Saturday, Mar 13, 2021 at 7:50 pm (GMT -5) Light mag. 3.3 earthquake - 57 km south of Ottawa, Ontario, Canada, on Saturday, Mar 13, 2021 at 7:50 pm (GMT -5)

Light magnitude 3.3 earthquake at 18 km depth

14 Mar 00:54 UTC: First to report: VolcanoDiscovery after 4 minutes.
15 Mar 11:11: Now using data updates from NRCAN
Update Sun, 14 Mar 2021, 05:40

Quake felt in southern Canada

People in the small town of Kemptville located about 12 km northwest of the quake's epicenter, as well as in other nearby areas, could clearly feel the quake in the evening.
Many described to have heard a loud sound followed by a short rattling movement of the ground.
Due to the regional geology of dense, old crustal rocks and its shallow depth, the quake - although comparably small in magnitude - was felt more strongly than it would under other circumstances (e.g. regions in sedimentary basins). There are no reports of damage.
Update Sun, 14 Mar 2021, 05:34

Small 2.7 quake hits near Ottawa, Ontario, Canada

2.7 quake 13 Mar 7:50 pm (GMT -5)
2.7 quake 13 Mar 7:50 pm (GMT -5)
An earthquake of magnitude 2.7 occurred early evening on Saturday 13 March 2021 at 7:50 pm local time near Ottawa, Ontario, Canada, as reported by the European-Mediterranean Seismological Centre (EMSC).
According to preliminary data, the quake was located at a very shallow depth of 5.6 miles. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. Magnitude and other quake parameters can still change in the coming hours as the agency continues to process seismic data.
Our monitoring service identified a second report from the United States Geological Survey which listed the quake at magnitude 2.7 as well.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Kemptville (pop. 500) located 8 miles from the epicenter. In Osgoode (pop. 2,600, 14 miles away), Brockville (pop. 23,900, 26 miles away), Nepean (pop. 180,000, 28 miles away), Kanata (pop. 90,000, 31 miles away), Ottawa (pop. 812,100, 33 miles away), Vanier (pop. 17,000, 35 miles away), Gatineau (pop. 242,100, 37 miles away), and Cornwall (pop. 48,800, 39 miles away), the quake was probably not felt.

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Earthquake details

Date & timeMar 14, 2021 00:50:03 UTC
Local time at epicenterSaturday, Mar 13, 2021 at 7:50 pm (GMT -5)
StatusConfirmed
Magnitude3.3
Depth18.0 km
Epicenter latitude / longitude44.9171°N / 75.488°W (United Counties of Leeds and Grenville, Ontario, Canada)
Antipode44.917°S / 104.512°E
Shaking intensityWeak shaking
Felt280 reports
Primary data sourceNRCAN (Department of Natural Resources Canada)
Nearby towns and cities16 km (10 mi) SE of Kemptville (Ontario) (pop: 500) | Show on map | Quakes nearby
22 km (14 mi) N of Prescott (Ontario) (pop: 4,470) | Show on map | Quakes nearby
39 km (25 mi) NNE of Brockville (Ontario) (pop: 23,900) | Show on map | Quakes nearby
50 km (31 mi) SSE of Nepean (Ontario) (pop: 180,000) | Show on map | Quakes nearby
54 km (34 mi) SE of Kanata (Ontario) (pop: 90,000) | Show on map | Quakes nearby
57 km (36 mi) SSE of Ottawa (Ontario) (pop: 812,100) | Show on map | Quakes nearby
61 km (38 mi) W of Cornwall (Ontario) (pop: 48,800) | Show on map | Quakes nearby
62 km (39 mi) S of Fallingbrook (Ontario) (pop: 25,000) | Show on map | Quakes nearby
65 km (40 mi) SSE of Gatineau (Québec) (pop: 242,100) | Show on map | Quakes nearby
341 km (212 mi) ENE of Toronto (Ontario) (pop: 2,600,000) | Show on map | Quakes nearby
Estimated seismic energy released5.6 x 109 joules (1.56 megawatt hours, equivalent to 1.34 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
3.318 km15 Km NW From Iroquois, ON, CanadaNRCAN
2.78.9 km19 Km SW of Winchester, CanadaUSGS
2.79 kmNEW YORK, CanadaEMSC

Seismograms

Seismic station: Lake Ozonia, New York, USA (LONY/US network) | Distance from quake: 79 km / 49 mi | Show on map | Station Info
Seismic station Lake Ozonia, New York, 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. Bandpass filter applied: 0.5-10.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool
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User reports for this quake (309)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Kemptville (29.4 km WSW of epicenter) [Map] / Light shaking (MMI IV) : Sustained rumble and some shaking. | 5 users found this interesting.  
Riverview Heights, Augusta Township, Ontario (24.3 km S of epicenter) [Map] / Light shaking (MMI IV) / 2-5 s : Somewhat like a train going by... with noise like a distant explosion. | 4 users found this interesting.  
Kemptville / Very weak shaking (MMI II) / rattling, vibrating / 2-5 s : Was a loud boom which shook the house. | 4 users found this interesting.  
Iroquois, ON / Light shaking (MMI IV) : 3-4 seconds rumble, then a heavy jolt from below the house. | 4 users found this interesting.  
Winchester (22 km NNE of epicenter) [Map] / Very weak shaking (MMI II) / rattling, vibrating / 10-15 s : We were in the basement so we did not feel anything but we heard the rumbling sound. Wondered if it was the furnace, a loud vehicle, train orow helicopter. | One user found this interesting.  
Iroquois / Weak shaking (MMI III) : Thought it was a train | 3 users found this interesting.  
Kars / Very weak shaking (MMI II) / 2-5 s : Rumble through the house. | 3 users found this interesting.  
Kemptville ontario (3055.4 km NW of epicenter) [Map] / Weak shaking (MMI III) / 10-15 s : Felt like thunder but lasted much longer and increased in intensity, rumbled, then decreased | 2 users found this interesting.  
North Gower / Weak shaking (MMI III) : Once it happened I knew it was a mini earthquake as I've felt one before. Just felt like a big truck going by on the road! | One user found this interesting.  
I live south of North Gower and definitely felt th / Moderate shaking (MMI V) : Light shaking and we were on the phone to friends in Smiths Falls and they also felt the same shaking. | One user found this interesting.  
Cynthia Roobol Kemptville ON / Very weak shaking (MMI II) / 2-5 s : Yelled down to my husband to see if he felt/heard that. He said yes that it was probably an earthquake. | One user found this interesting.  
Osgoode, ON / Light shaking (MMI IV) / rattling, vibrating / 2-5 s : House shook, low rumble with slight shaking like heavy equipment outside or a large plane reverse thrusting. | One user found this interesting.  
Glen Stewart (6.5 km E of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating : We heard a massive boom like something close exploded. It was really really loud. Then after the house shook.  
Toronto (419.8 km W of epicenter) [Map] / Very weak shaking (MMI II) / horizontal (sideways) swinging / very short : Woke up because I bumped my toe somehow, I was trying to go back to sleep when I felt an ever slight maybe even unnot  
Windsor (673.4 km WSW of epicenter) [Map] / Very weak shaking (MMI II) / horizontal (sideways) swinging / 5-10 s : Very slight wave under couch. Felt it twice in a row. If I was not sitting quietly I would not have noticed anything. I questioned myself if it was an earthquake but forgot about it after. It was around 8pm.  
10130 Nation River Road, South Mountain (5.2 km N of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 5-10 s : It felt like a VERY large truck was driving down the road, and then it hit a very big pothole outside our house causing a boom, then it continued quickly away.  
near Winchester, United Counties of Stormont, Dundas and Glengarry, Ontario (10.9 km NE of epicenter) [Map] / Light shaking (MMI IV) / very short : Heard a boom noise like being beside a dump truck when it hits a pot hole and the house vibrated. It was enough to wake and scare my 2 year old daughter. Brother in law did not feel it or notice it outside.  
South Mountain ontario (10.9 km NE of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / very short : Heard a moderate boom noise like being beside a dump truck when it hits a pothole and the house shook. It woke and scared my daughter. My brother in law did not feel or notice it outside though.  
Iroquois (16.7 km ESE of epicenter) [Map] / Weak shaking (MMI III) / very short : Heard a muffled noise that sounded like an explosion followed immediately by a brief shake of the house.  
Toronto (419.8 km W of epicenter) [Map] / Very weak shaking (MMI II) / horizontal (sideways) swinging / very short : Woke up because I bumped my toe somehow, I was trying to go back to sleep when I felt an ever slight maybe even unnot  
Inkerman ontario (14.1 km NE of epicenter) [Map] / Moderate shaking (MMI V) / 1-2 s : Dogs bolted out the door mom  
near Winchester, United Counties of Stormont, Dundas and Glengarry, Ontario (15.4 km N of epicenter) [Map] / Light shaking (MMI IV) / 20-30 s : It sounded lik  
Kemptville, Ontario, Canada (19.3 km WNW of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 2-5 s : We felt the vibration, stopped what we were doing, tried to figure out if a big truck was driving by, heard "noise" from the area of the refrigerator. Our dog was in a very anxious mood for the next 15 minutes.  
Winchester, Ontario (21 km NNE of epicenter) [Map] / Light shaking (MMI IV) / 20-30 s : I stopped the cleaning I was doing, looked outside a few windows expecting a truck very near, then assumed it was a rough cycle in the dishwasher I was standing next to.  
North Augusta Ontario (19.7 km SW of epicenter) [Map] / Very weak shaking (MMI II) / complex motion difficult to describe / 10-15 s : Heard / felt a noise in the house upon arrival . Neighbors called over and asked if there had been an explosion. Even the cat was spooked . Didn’t last very long  
South Gower, Ontario K0G 1J0 (12.2 km NNW of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 5-10 s : Heard a sudden low noise like a train passing or thunder but lasted longer than the usual thunderclap. House shook a bit but it was mostly the curious sound. We were watching television in the basement when it happened. Our dog did not stir.  
Prescott, Ontario (18.3 km SSW of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 10-15 s : Heard a rumble not overly loud but out of the ordinary for our area. Picture on the wall started vibrating and tapping against the wall. 10-15 seconds later it was done  
Osgoode (26.9 km NNW of epicenter) [Map] / Weak shaking (MMI III) / 10-15 s : It was felt out side by my fire pit, the ground felt uneven for 10-15 seconds | One user found this interesting.  
Morrisburg, United Counties of Stormont, Dundas and Glengarry, Ontario (18.7 km ESE of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s : Felt like it travelled from west to east under the house | One user found this interesting.  
North Augusta, ON. (2990.9 km NW of epicenter) [Map] / Light shaking (MMI IV) : Loud rumble lasting roughly 3 seconds | One user found this interesting.  
Iroquois (14.3 km ESE of epicenter) [Map] / Moderate shaking (MMI V) : Very loud rumble | One user found this interesting.  
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