Earthquakes

About this section

Know what shook—and whether it matters in Pacific Grove.

MyPG.news checks the official USGS catalog every two minutes and permanently saves PG Groundwatch detector-spike cards below. The 30-day local chart is limited to 50 miles, while progressively higher magnitude gates keep distant events from being presented as Pacific Grove news. A sensor spike is not called an earthquake unless it correlates with an official catalog event.

LATEST LOCALLY RELEVANT OFFICIAL REPORT

Checking the official USGS catalog…

The 30-day activity chart is limited to 50 miles. More distant earthquakes appear when they meet the magnitude gate or are linked to qualifying multi-station Groundwatch detections within 150 miles.

LOCAL RELEVANCE—distance + magnitude + verified impact

MYPG EARTHQUAKE RULES

Local detections, distance and magnitude guide coverage.

The daily chart and routine event list now cover only the 50-mile local area. MyPG still checks out to 350 miles so a genuinely major earthquake is not missed, but a distant event appears only when it passes the higher magnitude gate: M4.0+ within 100 miles, M5.5+ within 200 miles or M7.0+ from 200 to 350 miles. Within the local area, automatic prominence begins at M2.0 within 25 miles or M3.0 within 50 miles. A cataloged M2.0+ event within 150 miles also qualifies when Groundwatch associates it with a signal supported by at least two independent stations. This is an instrument-based association, not confirmation that people felt it or that damage occurred in Pacific Grove.

PG GROUNDWATCH • PERMANENT DETECTOR RECORD

Detected seismic spikes

0 saved cards

Each detector record remains here permanently. Station spikes and broad-amplitude events are shown separately; only a confirmed USGS catalog correlation receives an official event link.

Loading saved Groundwatch detections…

Checking PG Groundwatch

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30 DAYS • USGS CATALOG + PG GROUNDWATCH

Pacific Grove seismic activity

The map shows located USGS earthquakes. Groundwatch-only activity cannot be placed honestly without a cross-fix, so its time markers appear in the 3D view instead.

No earthquakes match these filters.

Under M1M1–1.9M2–2.9M3–3.9M4+Unlocated spikeBroad-event candidateMatched signalMatched USGS diamond

EVENTS0

MAX MAG—

CLOSEST—

GROUNDWATCH0

EXPLORE THE FIELD

Tap, hover or tab to inspect activity

USGS spheres show magnitude, distance and depth. Groundwatch diamonds show detection time only until the system has a defensible cross-fix or catalog match.

Minimum magnitude 0.5Maximum distance 50 mi

Sphere height, size and color encode USGS magnitude. A faceted diamond replaces the sphere when Groundwatch also correlated to that official USGS event. Groundwatch-only diamonds use a separate unlocated lane and never use height or distance as estimates. Detector activity is descriptive evidence—not a felt report or prediction.

PACIFIC GROVE RELEVANCE GATE • PERMANENT LINKS

Potentially relevant earthquake reports

0 in the current 7-day pull

M2.0+ LOCAL CATALOG • BELOW THE FEED GATE

Other magnitude 2.0+ detections within 50 miles

0 in the current 7-day pull

These official local-area events explain the red M2.0+ portion of the activity chart. They remain source-linked here, but their magnitude and distance do not meet MyPG’s automatic news threshold.

UNDER M2.0 • COMPACT MONITOR

Smaller official detections

0 in the current 7-day pull

These are official USGS detections, not individual MyPG stories. The bar compares magnitude within this under‑2 group; it does not show danger, damage or probability of another earthquake.

30-DAY DAILY ACTIVITY