A burst of 90 micro-quakes rattled neighborhoods near Los Angeles overnight, clustering along the Newport-Inglewood Fault Zone, according to published tallies.
Story Highlights
- Ninety small earthquakes, magnitude 1.0 to 2.7, were logged near Lennox and Westmont.
- Shaking also included a 2.6 event near Inglewood and several quakes off Catalina Island.
- The cluster aligned with the Newport-Inglewood Fault Zone through the Los Angeles Basin.
- No significant damage reports surfaced in early coverage; counts varied as data updated.
What Happened: A Concentrated Burst of Small Quakes
Local outlets reported that the United States Geological Survey recorded 90 micro-quakes around Lennox and Westmont from Friday evening into Saturday afternoon, with magnitudes between 1.0 and 2.7. The sequence marked a sharp rise in small shakes over a short window. A separate 2.6 magnitude earthquake near Westmont was logged around 4:32 a.m., and other minor events rippled across the region on September 11 and 12. Early coverage emphasized frequent, shallow jolts rather than one large mainshock.
Public trackers and station logs showed multiple Los Angeles Basin events on September 12, including magnitude 2.7 near Lennox and 2.6 near Inglewood. One listing for the Inglewood-area event noted a depth near 18.8 kilometers and more than 20 felt reports. Offshore, activity near Avalon on Santa Catalina Island included quakes measured at 3.4, 3.0, and 2.6, underscoring that the burst was regional, not just a single block-by-block cluster.
Where It Hit: Along a Known Fault System
Coverage tied the Lennox-Westmont swarm to the Newport-Inglewood Fault Zone, a right-lateral strike-slip fault that runs from Culver City to Newport Beach across dense urban areas. This fault system has produced notable earthquakes in the past century and remains a focus for planners and scientists. Small swarms on or near mapped faults are common in Southern California. They often reflect the crust releasing stress through many tiny slips instead of one larger rupture.
Seismologists describe swarms as a rise in quake counts over hours or days without a clear mainshock. Many events in a swarm are similar in size and may not follow the classic aftershock decay pattern. Government science explainers note that swarms can last for days, weeks, or even months, and their causes can include fluid movement or slow slip on nearby faults, not only imminent large breaks. That makes clear, steady communication important when counts jump quickly.
Why The Counts Differ: Real-Time Data Keeps Moving
Different outlets cited totals ranging from more than 60 to about 90 quakes during the burst, reflecting evolving catalogs and different time windows. Real-time earthquake feeds often update as computers add or drop low-magnitude picks, and as analysts review waves. That process can change magnitudes by a few tenths and add or merge events at the edges. The core picture stays the same here: many small quakes over a short time, clustered near the Los Angeles Basin.
We have an earthquake swarm currently in process in the Los Angeles Basin. No major quakes yet, but over 100 minor ones in that large cluster. Consider how the massive erosion that struck many SoCal beaches transported tons of sand to new locations and altered mass distribution. pic.twitter.com/kzHx4TQ6LF
— Stefan Burns (@StefanBurnsGeo) September 13, 2026
Early reports did not describe injuries or notable damage tied to these small magnitudes. That fits past experience: quakes below magnitude 3.0 rarely damage buildings, but they do remind residents that the region’s faults are active. The practical takeaway is simple. Keep emergency kits ready, secure heavy furniture, review family plans, and know how to drop, cover, and hold on. Preparation beats panic when the ground starts to move.
What Matters Now: Calm, Prepared, and Informed
This cluster touches a larger public worry that government messaging often feels late or unclear when the ground shakes. People want fast facts, not hype or silence. Clear posts from city and county emergency offices, paired with steady updates from scientists, help reduce fear and guesswork. When agencies share what they know and what they do not yet know, families can make better choices without getting swept up in rumor or alarm.
Sources:
nypost.com, latimes.com, earthquake.usgs.gov, ktla.com, earthquaketracker.org
