Country profile · USGS ComCat
Earthquakes in South Sudan
South Sudan has catalogued 7 M4+ earthquakes since 2005 (ranked 148th of 187 countries), with the strongest reaching magnitude M7.2.
South Sudan ranks 148th of 187 countries by catalogued seismic activity - a country with limited but non-zero seismic activity, averaging about 0 M4+ events a year alongside 5 significant M6+ earthquakes since 1900. The M6+ record here is thin - 5 events in all, so a single quake moves every figure on this page.
- 7
- M4+ events (since 2005)
- 5
- Major M6+ (since 1900)
- M7.2
- Strongest
- ~0
- M4+ per year
The verdict
South Sudan is relatively quiet seismically compared to most places tracked here, with 7 M4+ earthquakes logged since 2005 and 5 major M6+ events since 1900, the strongest reaching magnitude 7.2.
- 1990
- busiest year (4 major events)
- 15 km
- average recorded event depth
- 100%
- of events are shallow (<70 km, the most damaging kind)
Average catalogued magnitude is 4.5 - most events are moderate M4-5 tremors that are felt but rarely cause damage. On the M4+ activity ladder French Polynesia sits immediately above at 8 events and Bermuda sits immediately below at 6.
USGS event tape strip
Event tape SOUTH-SUDAN · South Sudan M4+ · 148th/187
South Sudan · 7 M4+ · max M7.2 · 5 M6+
- VS-PEER 7
- COMCAT 148th/187
- TAPE M7.2
- EPIC 5
- YOY near French Polynesia
- BAND 100% shallow
Stamps derive from this country's USGS ComCat row (M4+ book, rank, peak magnitude, M6+ record, ladder neighbour, depth/peak year), not a hazard forecast. PlainQuake is informational only - not professional advice and not a substitute for official USGS guidance. See our disclaimer. Verify with USGS ComCat → · Read with methodology → · How earthquakes are measured → · Reading earthquake data → · All country catalog rows → · Countries ranked →
Observed impact record
What ComCat observed after earthquakes in South Sudan
USGS recorded Modified Mercalli Intensity (MMI) for 4 events in this catalogued record; their average observed intensity was MMI 8.2. These are only events with an observation, not an estimate of future shaking or a safety rating.
- MMI observations
- 4
- Average observed MMI
- 8.2
- PAGER alerts / tsunami flags
- 0 / 0
Source: USGS Comprehensive Earthquake Catalog (ComCat) GeoJSON impact fields. Missing MMI, alert, and tsunami values remain unreported rather than being treated as zero.
Where South Sudan sits in the catalog
Rank 148th of 187 tracked countries (20th percentile by M4+ count since 2005). On the M4+ activity ladder French Polynesia sits immediately above at 8 events and Bermuda sits immediately below at 6.
- French Polynesia - next more active (8 M4+)
- Bermuda - next less active (6 M4+)
Same M4+ count, broken by peak magnitude
2 tracked countries share South Sudan's exact count of 7 M4+ events since 2005. Among that cohort, South Sudan ranks 1st of 2 by strongest recorded magnitude (M4.8).
| Country | M4+ count | Strongest |
|---|---|---|
| South Sudan (this page) | 7 | M4.8 |
| Hungary | 7 | M4.5 |
0 of 7 catalogued M4+ events since 2005 reached M6.0 or higher.
Magnitude distribution of major events
Breakdown of the 5 significant (M6+) earthquakes on record for South Sudan.
M7.0-7.9
2
40.0%
M6.0-6.9
3
60.0%
Depth of major earthquakes
Hypocentral depth of the 5 M6+ events, shallow quakes shake the surface hardest. Average depth: 15 km.
Shallow (<70 km)
5
100.0% of events
Intermediate (70–300 km)
0
0.0% of events
Deep (>300 km)
0
0.0% of events
Strongest earthquakes in South Sudan
The 5 most powerful events on record (USGS, since 1900).
| Mag | Location | Depth | Date |
|---|---|---|---|
| 7.2 | 69 km ENE of Juba, South Sudan | 14.9 km | May 20, 1990 |
| 7.1 | 63 km NNE of Juba, South Sudan | 16.0 km | May 24, 1990 |
| 6.6 | 60 km N of Juba, South Sudan | 12.6 km | Jul 9, 1990 |
| 6.5 | 54 km NNE of Juba, South Sudan | 16.5 km | May 24, 1990 |
| 6.5 | 106 km SE of Bor, South Sudan | 15.0 km | May 21, 1915 |
Significant earthquake record (5 events)
Every catalogued magnitude-6.0-and-above earthquake in South Sudan since 1900, most recent first.
| Mag | Location | Depth | Date |
|---|---|---|---|
| 6.6 | 60 km N of Juba, South Sudan | 12.6 km | Jul 9, 1990 |
| 7.1 | 63 km NNE of Juba, South Sudan | 16.0 km | May 24, 1990 |
| 6.5 | 54 km NNE of Juba, South Sudan | 16.5 km | May 24, 1990 |
| 7.2 | 69 km ENE of Juba, South Sudan | 14.9 km | May 20, 1990 |
| 6.5 | 106 km SE of Bor, South Sudan | 15.0 km | May 21, 1915 |
Other countries in this catalog sample
A South Sudan-keyed shuffle of the full 186-country roster, not the six nearest by count.
Peak-magnitude sample from the same roster
A second South Sudan-keyed shuffle of countries with a recorded max magnitude.
Showing 6 of 186 countries with a recorded max magnitude.
According to the US Geological Survey Earthquake Hazards Program, PlainQuake's figures are rendered directly from 317,293 recorded M4+ earthquakes and 14,444 significant M6+ events (USGS ComCat, 2005-present) -- no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026-08-26.