Thanksgiving Morning Quakes Rattle Northern California
On Thanksgiving morning, Northern California experienced a minor earthquake that shook the San Francisco Bay Area. The United States Geological Survey (USGS) reported a 3.6-magnitude quake at 4:21 a.m. Pacific time, located approximately two miles southeast of The Geysers, California.
Details of the Thanksgiving Morning Quake
Shortly after the initial tremor, another earthquake of similar magnitude occurred less than a mile away. This was followed by several smaller aftershocks throughout the day. As seismologists analyzed the data, they noted that the initial quake’s magnitude might be revised based on further information.
Aftershock Patterns in Northern California
Aftershocks are often minor earthquakes that occur following a larger quake. They result from adjustments along the fault line that moved during the initial earthquake. In this case, these aftershocks can continue for days, weeks, or even years after the initial event.
Understanding Aftershocks
- Aftershocks can match or exceed the magnitude of the initial earthquake.
- They may pose risks to areas already affected by the initial quake.
- Seismologists utilize data from several days to assess the full impact of the quake and aftershocks.
The USGS categorizes shaking intensity based on the Modified Mercalli Intensity scale. Updated maps and reports on the quakes and aftershocks will include data from nearby regions within a 100-mile radius.
Conclusion
The Thanksgiving morning quakes serve as a reminder of the seismic activity prevalent in Northern California. Residents in the area must remain aware of their surroundings as aftershocks can occur unpredictably.
