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227 earthquakes globally today

Earthquakes Near San Sebastian, Puerto Rico 00685 Today

Live data from USGS · Monitoring ZIP code 00685 Updated just now

3 tiny quakes nearby. Too small to feel. Completely normal background activity.

📱 Get earthquake alerts — download the app for real-time notifications

Recent Earthquakes Near San Sebastian, Puerto Rico

3 earthquakes have been recorded within 250 miles of San Sebastian, Puerto Rico in the past 24 hours. Alertra monitors seismic activity near ZIP code 00685 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 San Sebastian, this earthquake watch dashboard provides real-time magnitude data, an interactive seismic map, and earthquake history going back 15+ years.

Earthquake Alerts for San Sebastian, Puerto Rico

Alertra delivers real-time earthquake alerts for San Sebastian and the surrounding 00685 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 — San Sebastian

Live seismic risk assessment · Updated every 60 seconds from USGS

Current Threat Level
All Quiet
LowModerateHigh
Threat score: 5 / 100

Some seismic activity near San Sebastian. Most too small to feel.

Earthquakes nearby 3
Closest to you M2.2, 26 mi
Strongest in last 24hr M2.2, Rarely felt
Last felt M4.0+ 10 days ago
Tracking Area
San Sebastian
LIVE EARTHQUAKES
Found 3 in region
Major (6.0+)
Moderate (4.0 - 5.9)
Minor (Below 4.0)
Your Location

🌍 Recent Earthquakes Near San Sebastian

Past 24 hours within 250 miles · Source: USGS

Showing events within 250 miles · Past 24 hours · Source: USGS
Sort by:
MagnitudeWhat You'd FeelLocationDistanceWhen
M2.2 		Rarely felt 4 km WSW of Guánica, Puerto Rico 26 mi 6:03 AM Details →
M2.1 		Rarely felt 4 km E of Tallaboa, Puerto Rico 31 mi 8:01 PM Details →
M2.0 		Rarely felt 7 km SSW of Guánica, Puerto Rico 30 mi 5:42 PM Details →

📈 Earthquake History — San Sebastian

Since 2019 · M2.5+ · 250 mi radius

San Sebastian has recorded 19,872 earthquakes of magnitude 2.5 or greater within 250 miles since 2019. The largest was a M6.4 on Jan 7, 2020, located 4 km SSE of Indios, Puerto Rico. On average, the area experiences approximately 2897 notable seismic events per year.

M2.5+ in Past 7 Days

Sat
7
MAX M3.7
Sun
1
MAX M3.8
Mon
2
MAX M3.2
Tue
1
MAX M3.3
Wed
9
MAX M3.5
Thu
2
MAX M3.1
Fri
0
—
Since 2019 · M2.5+ · 250 mi

Yearly Activity · 19872 events

Past Week
View:
M2.5–4 (bars)
M4+ (line, right axis)
Yearly Earthquake Activity by Magnitude02k4k6k8k050100150200'20'22'24'262019: 2,141 (M2.5–4), 34 (M4+)2020: 6,965 (M2.5–4), 169 (M4+)2021: 2,420 (M2.5–4), 62 (M4+)2022: 1,934 (M2.5–4), 86 (M4+)2023: 2,030 (M2.5–4), 108 (M4+)2024: 1,587 (M2.5–4), 68 (M4+)2025: 1,428 (M2.5–4), 62 (M4+)2026: 749 (M2.5–4), 29 (M4+)
Event count (bars)
Seismic energy index (line)
Yearly Seismic Energy Release02k4k6k8k02.0B4.0B6.0B8.0B'20'22'24'262019: 2,175 events, Energy: 1.3B2020: 7,134 events, Energy: 7.2B2021: 2,482 events, Energy: 567.6M2022: 2,020 events, Energy: 584.4M2023: 2,138 events, Energy: 1.0B2024: 1,655 events, Energy: 620.1M2025: 1,490 events, Energy: 2.0B2026: 778 events, Energy: 236.4M
Largest Recorded
M6.4
4 km SSE of Indios, Puerto Rico
Jan 7, 2020
Avg Noticeable / Year
472.1
Estimated felt (MMI ≥ II)

Strongest Recorded Earthquakes

M6.4 Jan 7, 2020
4 km SSE of Indios, Puerto Rico
M6.1 Jan 20, 2023
40 km WSW of Pointe-Noire, Guadeloupe
M6.0 May 16, 2026
60 km ESE of Codrington, Antigua and Barbuda
M6.0 Sep 24, 2019
67 km NNW of San Antonio, Puerto Rico
M5.9 Jan 11, 2020
5 km SE of Maria Antonia, Puerto Rico
M5.9 Feb 25, 2025
102 km NNE of Punta Cana, Dominican Republic
📊 Looking for detailed historical data?

🛡️ Earthquake Safety — San Sebastian, Puerto Rico

What San Sebastian 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 San Sebastian with live tracking

🔔 Get earthquake alerts for San Sebastian
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 San Sebastian. Our threat scores, historical trend charts, and proximity alerts are all derived from this data — updated every 60 seconds.

Earthquake FAQ — San Sebastian, Puerto Rico

Was there an earthquake in San Sebastian today?

3 tiny quakes nearby. Too small to feel. Completely normal background activity. This page shows all earthquakes detected within 250 miles of San Sebastian in the past 24 hours, updated every 60 seconds from USGS.

Did an earthquake just happen near San Sebastian?

Check the live earthquake table above for the most recent seismic events near 00685. Alertra detects earthquakes right now as they happen and can send you instant earthquake alerts for San Sebastian.

What is the earthquake history for San Sebastian, Puerto Rico?

Alertra tracks USGS seismic records going back 15+ years for the San Sebastian area. View the historical trends chart above to see yearly earthquake frequency and the largest recorded event near 00685.

How do I get earthquake alerts for San Sebastian?

Download the Alertra app to receive push notifications within 60 seconds of any earthquake detected near 00685. Alertra monitors USGS seismic data 24/7 — no manual earthquake watch required.

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