Every recorded earthquake within 30 km
Earthquakes near Ansonia, CT
No earthquake was likely felt in Ansonia in the 24 hours to 6:38 pm EST (23:38 UTC). The last one was M 3.8, 281 km (175 mi) NE, at 10:22 am EST on 27 January 2025, estimated intensity II (weak) in town; 42,440 felt reports to USGS.
M 1.5
Latest: 6:06 am EST on 27 February 2018 · 6 km (4 mi) ESE of Ansonia, CT
The most recent earthquake near Ansonia was M 1.5, 6 km (4 mi) ESE of Ansonia, CT, at 6:06 am EST on 27 February 2018, 11 km deep. The estimated shaking in Ansonia was intensity II (weak), felt by some people at rest indoors.
No earthquake of M1.5 or more was recorded within 30 km (19 mi) of Ansonia in the last 24 hours.
- Last 24 hours
- 0
- Last 7 days
- 0
- Last 30 days
- 0
- Last 12 months
- 0
- Since 2016
- 1 earthquake of M1.5 or more within 30 km
- Largest since 2016
- M 1.5 on 27 February 2018, 6 km (4 mi) ESE of Ansonia, CT
- Reported felt
- 0 of them have felt reports to USGS
USGS · feed checked · newest earthquake in our database · this page · counts are earthquakes of M1.5 or more within 30 km (19 mi) of the town centre; shaking is estimated for the town centre with the intensity equation USGS Did You Feel It? uses
For earthquakes near you, see Earthquake near me right now.
If you felt one
- Was that an earthquake? — checks what was recorded near you in the last hour
- Report what you felt to USGS — reports go to USGS, not to us, and they are what produces the intensity maps
- Expect aftershocks, and be ready to Drop, Cover, and Hold On if you feel one; if you are in a damaged building, go outside and move away from it (Ready.gov, FEMA; what to do during and after an earthquake)
- Earthquakes in Connecticut — with the state's activity score
QuakeIndex does not issue warnings or forecasts. For earthquake early warning see ShakeAlert and the MyShake app.
Earthquake alerts for Ansonia, CT
Get a notification in this browser when USGS records an earthquake near Ansonia, CT. No account or email needed.
Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
The last 30 days
The latest 1
From the QuakeIndex database, which reads the USGS feed every 30 seconds and holds the USGS catalogue for the US from 2016 (M1.5+). Times are Ansonia time. Distances are from the town centre. Quakes USGS named after Ansonia are listed even when they are further out.
Show these earthquakes on your own site: a free card with the latest quakes near Ansonia, for a local news site, school or neighborhood page.
On the map
The white circle is Ansonia; dots are the 1 most recent earthquakes within 30 km. Map © OpenStreetMap contributors.
Estimated shaking in Ansonia
None of the quakes recorded near Ansonia since 2016 is likely to have been felt in town: each was small for its distance. Intensity II and III are felt by some people at rest indoors; IV by most people indoors; V and above wakes sleepers and moves objects.
| Magnitude | When | Distance | Shaking in Ansonia (est.) |
|---|---|---|---|
| M 1.5 | 6 km | II · Weak |
An estimate for the town centre from magnitude, depth and distance, with the intensity equation USGS Did You Feel It? uses (Atkinson & Wald, 2007), on the Modified Mercalli scale. Ground conditions change it street by street. It describes the past, not a hazard.
Before 2016
The USGS record since 1900 lists no earthquake of M5 or more within 50 km of Ansonia.
USGS ComCat, M5+ from 1900 to 2015. This is the record, not a forecast.
Be ready
Earthquakes cannot be predicted, here or anywhere, so the useful step is the one taken beforehand. The advice below is from the agencies responsible for it.
- Ready.gov: earthquakes (FEMA) — what to do before, during and after, including Drop, Cover, and Hold On
- Build a kit (FEMA) — water, food and supplies for several days; our summary
- USGS: preparedness — the hazard behind the advice, from the agency that records every quake on this page
- The Great ShakeOut — the yearly earthquake drill, with material for homes, schools and workplaces
QuakeIndex does not issue warnings or forecasts. For earthquake early warning see ShakeAlert and the MyShake app.