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Earthquakes Near Union Center, South Dakota 57787 Today

Live data from USGS · Monitoring ZIP code 57787 Updated just now

No earthquakes detected within 250 miles of Union Center in the past 24 hours. The ground is quiet.

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Recent Earthquakes Near Union Center, South Dakota

0 earthquakes have been recorded within 250 miles of Union Center, South Dakota in the past 24 hours. Alertra monitors seismic activity near ZIP code 57787 using live data from the U.S. Geological Survey (USGS), updated every 60 seconds. Whether you felt shaking or are checking if an earthquake just happened near Union Center, this earthquake watch dashboard provides real-time magnitude data, an interactive seismic map, and earthquake history going back 15+ years.

Earthquake Alerts for Union Center, South Dakota

Alertra delivers real-time earthquake alerts for Union Center and the surrounding 57787 area. When seismic activity is detected nearby, push notifications are sent within 60 seconds — no manual earthquake watch required.

Coming soon! We're working on bringing monitoring to Alertra.

📊 Earthquake Watch — Union Center

Live seismic risk assessment · Updated every 60 seconds from USGS

Current Threat Level
All Quiet
LowModerateHigh
Threat score: 0 / 100

No earthquakes detected near Union Center. Everything is calm.

Earthquakes nearby 0
Closest to you None detected
Strongest in last 24hr None detected
Last felt M4.0+ 1242 days ago
Tracking Area
Union Center
LIVE EARTHQUAKES
Found 0 in region
Major (6.0+)
Moderate (4.0 - 5.9)
Minor (Below 4.0)
Your Location

🌍 Recent Earthquakes Near Union Center

Past 24 hours within 250 miles · Source: USGS

Showing events within 250 miles · Past 24 hours · Source: USGS
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No earthquakes detected within 250 miles in the past 24 hours.

📈 Earthquake History — Union Center

Since 2006 · M2.5+ · 250 mi radius

Union Center has recorded 3,723 earthquakes of magnitude 2.5 or greater within 250 miles since 2006. The largest was a M4.5 on May 1, 2012, located Wyoming. On average, the area experiences approximately 195 notable seismic events per year.

M2.5+ in Past 7 Days

Fri
0
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Sat
0
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Sun
0
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Mon
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Tue
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Since 2006 · M2.5+ · 250 mi

Yearly Activity · 3723 events

Past Month
View:
M2.5–4 (bars)
M4+ (line, right axis)
Yearly Earthquake Activity by Magnitude010020030001122'07'10'13'16'19'22'252006: 190 (M2.5–4), 0 (M4+)2007: 173 (M2.5–4), 0 (M4+)2008: 187 (M2.5–4), 0 (M4+)2009: 135 (M2.5–4), 2 (M4+)2010: 99 (M2.5–4), 0 (M4+)2011: 173 (M2.5–4), 2 (M4+)2012: 196 (M2.5–4), 1 (M4+)2013: 173 (M2.5–4), 0 (M4+)2014: 181 (M2.5–4), 0 (M4+)2015: 232 (M2.5–4), 0 (M4+)2016: 169 (M2.5–4), 0 (M4+)2017: 220 (M2.5–4), 1 (M4+)2018: 229 (M2.5–4), 0 (M4+)2019: 189 (M2.5–4), 0 (M4+)2020: 154 (M2.5–4), 0 (M4+)2021: 186 (M2.5–4), 1 (M4+)2022: 178 (M2.5–4), 0 (M4+)2023: 203 (M2.5–4), 1 (M4+)2024: 171 (M2.5–4), 0 (M4+)2025: 213 (M2.5–4), 0 (M4+)2026: 64 (M2.5–4), 0 (M4+)
Event count (bars)
Seismic energy index (line)
Yearly Seismic Energy Release0100200300010.0M20.0M30.0M'07'10'13'16'19'22'252006: 190 events, Energy: 14.0M2007: 173 events, Energy: 11.8M2008: 187 events, Energy: 9.7M2009: 137 events, Energy: 12.4M2010: 99 events, Energy: 6.5M2011: 175 events, Energy: 10.0M2012: 197 events, Energy: 17.3M2013: 173 events, Energy: 16.5M2014: 181 events, Energy: 21.6M2015: 232 events, Energy: 22.5M2016: 169 events, Energy: 18.1M2017: 221 events, Energy: 17.3M2018: 229 events, Energy: 13.7M2019: 189 events, Energy: 15.5M2020: 154 events, Energy: 12.5M2021: 187 events, Energy: 12.6M2022: 178 events, Energy: 9.8M2023: 204 events, Energy: 16.0M2024: 171 events, Energy: 11.3M2025: 213 events, Energy: 12.6M2026: 64 events, Energy: 4.2M
Largest Recorded
M4.5
Wyoming
May 1, 2012
Avg Noticeable / Year
0.4
Estimated felt (MMI ≥ II)

Strongest Recorded Earthquakes

M4.5 May 1, 2012
Wyoming
M4.2 Sep 25, 2009
15 km E of Alzada, Montana
M4.1 Mar 1, 2026
4 km E of Cowles, Nebraska
M4.1 Jan 23, 2023
11 km E of Wright, Wyoming
M4.1 Jun 30, 2018
5 km SE of Arnold, Nebraska
M4.0 Jul 20, 2021
26 km ESE of Wright, Wyoming
📊 Looking for detailed historical data?

🛡️ Earthquake Safety — Union Center, South Dakota

What Union Center residents should know before, during, and after an earthquake

🏠 Step 1

Before: Secure Your Space

Bolt heavy furniture to walls. Keep an emergency kit within arm's reach of where you sleep. Know your exits.

🛡️ Step 2

During: Drop, Cover, Hold On

Drop to your hands and knees. Take cover under sturdy furniture. Hold on until the shaking stops. Stay away from windows.

🚪 Step 3

After: Check and Evacuate

Check for injuries and damage. If you smell gas, leave immediately and call 911. Expect aftershocks.

72-Hour Emergency Kit

✓ 1 gallon of water per person per day
✓ Non-perishable food (3-day supply)
✓ Battery-powered NOAA weather radio
✓ Flashlight and extra batteries
✓ First aid kit
✓ Whistle to signal for help
✓ N95 dust masks
✓ Plastic sheeting and duct tape
✓ Wrench or pliers to turn off utilities
✓ Manual can opener

Notable US Seismic History

1994 Northridge, CA
M6.7
57 fatalities, $50B in damage. One of the costliest US natural disasters.
2011 Virginia
M5.8
Felt across 22 states. The most widely felt earthquake in US history.
2018 Anchorage, AK
M7.1
Major infrastructure damage across south-central Alaska.

📍 Nearby Earthquake Monitoring

Cities near Union Center with live tracking

🔔 Get earthquake alerts for Union Center
Alertra monitors live data 24/7 and sends push notifications the moment a earthquake is detected near you.

🏢 About Alertra

Alertra is an earthquake monitoring platform built by a team of engineers in Arizona focused on natural disaster safety technology. We provide real-time earthquake alerts and risk assessments to help communities prepare before disaster strikes.

Alertra ingests real-time seismic data from the U.S. Geological Survey (USGS) and combines it with over 15 years of legacy earthquake records to build localized risk models for communities like Union Center. Our threat scores, historical trend charts, and proximity alerts are all derived from this data — updated every 60 seconds.

Earthquake FAQ — Union Center, South Dakota

Was there an earthquake in Union Center today?

No earthquakes detected within 250 miles of Union Center in the past 24 hours. The ground is quiet. This page shows all earthquakes detected within 250 miles of Union Center in the past 24 hours, updated every 60 seconds from USGS.

Did an earthquake just happen near Union Center?

Check the live earthquake table above for the most recent seismic events near 57787. Alertra detects earthquakes right now as they happen and can send you instant earthquake alerts for Union Center.

What is the earthquake history for Union Center, South Dakota?

Alertra tracks USGS seismic records going back 15+ years for the Union Center area. View the historical trends chart above to see yearly earthquake frequency and the largest recorded event near 57787.

How do I get earthquake alerts for Union Center?

Download the Alertra app to receive push notifications within 60 seconds of any earthquake detected near 57787. Alertra monitors USGS seismic data 24/7 — no manual earthquake watch required.

App Coming Soon!

We're putting the final touches on the Alertra app. Enter your email below to join the waitlist and get early access.