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Minor earthquake: M2.8 quake has struck near Alum Rock in CA

Posted by admin on October 18, 2025 0 Comments

Earthquake location 37.346332550049S, -121.70833587647WA minor earthquake with magnitude 2.8 (ml/mb) was detected on Saturday, 11 kilometers (7 miles) from Alum Rock in CA. Date and time of earthquake in UTC/GMT: 18/10/25 / 2025-10-18 09:16:41 / October 18, 2025 @ 9:16 am. Id of earthquake: nc75250956. Event ids that are associated: nc75250956. The 2.8-magnitude earthquake has occurred at 09:16:41 / 9:16 am (local time epicenter). The earthquake was roughly at a depth of 7.539999961853 km (5 miles). Exact location of earthquake, -121.70833587647° West, 37.346332550049° North, depth 7.539999961853 km.

Country/countries that might be effected, United States (c. 310 233 000 pop). The epicenter was 17 km (10 miles) from San Jose (c. 945 900 pop), 71 km (44 miles) from Oakland (c. 390 700 pop), 77 km (48 miles) from Stockton (c. 291 700 pop), 33 km (21 miles) from Fremont (c. 214 100 pop), 71 km (44 miles) from Modesto (c. 201 200 pop). Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Stockton, Berkeley, Country Club.

In the past 24 hours, there have been 0, in the last 10 days two, in the past 30 days four and in the last 365 days fifty-two earthquakes of magnitude 3.0 or greater that has occurred nearby. Earthquakes 2.5 to 2.9 are often felt, but only causes minor damage. Every year there are an estimated 1,300,000 minor earthquakes in the world.

Did you feel anything?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city and country. This data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: 11 km ESE of Alum Rock, CA.

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More information

Parameter Value Description
Magnitude 2.8 mb The magnitude for the event.
Longitude -121.70833587647° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 37.346332550049° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 7.539999961853 km Depth of the event in kilometers.
Place 11 km ESE of Alum Rock, CA Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-10-18 09:16:41 Time when the event occurred. UTC/GMT
Updated 2025-10-18 09:20:55 Time when the event was most recently updated. UTC/GMT
Timezone offset Timezone offset from UTC in minutes at the event epicenter.
Felt 1 The total number of felt reports
CDI 2 The maximum reported intensity for the event.
MMI The maximum estimated instrumental intensity for the event.
Alert Level The alert level from the PAGER earthquake impact scale. Green, Yellow, Orange or Red.
Review Status automatic Indicates whether the event has been reviewed by a human.
Tsunami 0 This flag is set to "1" for large events in oceanic regions and "0" otherwise. The existence or value of this flag does not indicate if a tsunami actually did or will exist.
SIG 121 A number describing how significant the event is. Larger numbers indicate a more significant event.
Network nc The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,nc, A comma-separated list of network contributors.
Number of Stations Used 83 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.0916 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.07 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 41 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type md The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID nc75250956 Id of event.
Event Code 75250956 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,nc75250956, A comma-separated list of event ids that are associated to an event.

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