U.S. state profile · USGS ComCat
Earthquakes in Arkansas
Arkansas has catalogued 5 M4+ earthquakes since 2005 (ranked 23rd of 39 U.S. states), with the strongest reaching magnitude M4.7.
Arkansas ranks 23rd of 39 U.S. states and territories by catalogued seismic activity - a state with limited seismic activity, averaging about 0 M4+ events a year alongside 0 significant M6+ earthquakes since 1900. Below: the full M6+ event history, magnitude and depth profile, and yearly trend.
- 5
- M4+ events (since 2005)
- 0
- Major M6+ (since 1900)
- M4.7
- Strongest
- ~0
- M4+ per year
The verdict
Arkansas is below the global median in catalogued seismic activity, with 5 M4+ earthquakes logged since 2005 and 0 major M6+ events since 1900, the strongest reaching magnitude 4.7.
- N/A
- no yearly breakdown available
- N/A
- average recorded event depth
- 0%
- of events are shallow (<70 km, the most damaging kind)
Average catalogued magnitude is 4.2 - most events are moderate tremors felt but rarely damaging. On the M4+ activity ladder Arizona sits immediately above at 7 events and Illinois sits immediately below at 3.
USGS ComCat event tape
Event tape AR · Arkansas M4+ · 23rd/39
Arkansas · 5 M4+ · max M4.7 · 0 M6+
- PCT 5
- VS-PEER 23rd/39
- COMCAT M4.7
- TAPE 0
- EPIC near Arizona
- YOY Feb 28, 2011
Stamps derive from this jurisdiction'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 → · Most active U.S. regions → · All state catalog rows → · States ranked →
Where Arkansas sits in the catalog
Rank 23rd of 39 tracked U.S. states and territories (36th percentile by M4+ count since 2005). On the M4+ activity ladder Arizona sits immediately above at 7 events and Illinois sits immediately below at 3.
No M6+ events on the significant record
Arkansas has catalogued M4+ activity since 2005 but zero magnitude-6.0-and-above events in the USGS significant series back to 1900. The nearest tracked jurisdiction that does carry an M6+ record is Arizona (7 M4+ · 3 M6+).
Same M4+ count, broken by peak magnitude
3 tracked jurisdictions share Arkansas's exact catalogued count of 5 M4+ events since 2005. Among that cohort, Arkansas ranks 3rd of 3 by strongest recorded magnitude (M4.7).
Seismic hazard context
Catalogued counts on this page are history, not a building-code hazard map. Arkansas's latest M4+ catalog entry is dated Feb 28, 2011. For the national PGA design-basis tiers, see the seismic risk maps guide or the USGS National Seismic Hazard Model.
Peak-magnitude sample from the same roster
A Arkansas-keyed shuffle of states with a recorded max magnitude. Layout order flips by state so sibling pages do not open the same block first.
Other states in this catalog sample
A second Arkansas-keyed shuffle of the full 38-state roster (not ABS-gap nearest neighbors).
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.