M6.1 Earthquake 99 km WNW of Mantua, Cuba — June 8, 2026
2026-06-08 18:00:27 UTC (2026-06-08) · approx. 12:00 PM UTC-6 local
Felt by 5,776 people across a wide area. Maximum shaking intensity MMI 5.0 (strong).
On June 8, 2026 at 18:00 UTC, a magnitude 6.1 shallow crustal earthquake struck 99 km WNW of Mantua, Cuba, at a depth of 26.0 km and coordinates 22.7910°, -85.0919°. The earthquake was reported felt by 5,776 peopleacross a wide area, with a maximum shaking intensity of Modified Mercalli Intensity (MMI) 5.0 (strong). The USGS PAGER system issued a green alert level for this event, indicating no significant casualties or damage expected. This earthquake was detected by 264 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 1132, making it one of the most significant global earthquakes in recent days. The nearest populated place is Mantua (population 26,065).
Physical scale: An earthquake of magnitude 6.1 releases seismic energy equivalent to roughly 21 kilotons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 9.7 km — a useful intuition for the size of the slip patch on the fault.
Nearest Populated Places
What the Shaking Felt Like
At MMI 5.0 (strong), people in the most strongly affected areas would have experienced: Moderate shaking that everyone in the area would feel. Sleeping people are awakened. Dishes and windows may break. Unstable objects may be knocked over.
ShakeMap — predicted shaking intensity
Modeled ground-motion intensity contoured on the Modified Mercalli scale (MMI). Computed by the USGS from the moment-tensor solution and regional ground-motion prediction equations.
Source: U.S. Geological Survey ShakeMap. View interactive ShakeMap on USGS
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 5,776 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Population exposure (USGS PAGER)
Estimated population that experienced each level of shaking. Based on the USGS PAGER rapid impact assessment, which combines ShakeMap output with global population grids.
| Shaking intensity (MMI) | Description | Population exposed |
|---|---|---|
| MMI 3 | weak | 522,593 |
| MMI 4 | light | 1,080,809 |
| MMI 5 | moderate | 2,382 |
Earthquake Details
-85.0919°E
Technical Information
Common Questions
How strong was the magnitude 6.1 earthquake near Mantua, Cuba?
The magnitude 6.1 earthquake that struck 99 km WNW of Mantua, Cuba on June 8, 2026 at 18:00 UTC had a depth of 26.0 km. It was felt by 5,776 people with maximum shaking intensity of MMI 5.0 (strong). For context, this was a strong earthquake capable of causing significant damage.
Where did the earthquake occur?
The earthquake epicenter was located at 22.7910°, -85.0919°, which is 99 km WNW of Mantua, Cuba. The nearest populated place is Mantua (population 26,065).
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 6.1 earthquakes can continue for weeks to months and gradually diminish over time.
Actions
Location
Authoritative source: USGS event page (event ID: us7000srjx). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, June 8, 2026). M6.1 Earthquake 99 km WNW of Mantua, Cuba — June 8, 2026. Retrieved July 20, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000srjx/