A magnitude 5.8–6.4 earthquake struck Northern California in 1898, causing $350,000 in damage and remaining seismologically debated due to its pre-instrumental era.
Key Facts
- Date
- March 30, 1898, at 23:43 local time
- Moment Magnitude
- 5.8–6.4
- Max Mercalli Intensity
- VIII–IX (Severe–Violent)
- Estimated Damage
- $350,000 (approx. $10,700,000 in 2018 dollars)
- Area of Perceptibility
- Much of northern and central California and western Nevada
By the Numbers
Location
Cause → Event → Consequence
The earthquake originated from an unknown fault mechanism, likely one of the many strike-slip faults of the San Andreas Fault System in the North Bay region, though an unnamed dip-slip fault has also been proposed. The exact source fault and epicenter remain disputed among researchers due to the event's pre-instrumental nature.
On March 30, 1898, at 23:43 local time, an earthquake of moment magnitude 5.8–6.4 struck Northern California with a maximum Mercalli intensity of VIII–IX. The most severe damage occurred on Mare Island, a peninsula in northern San Francisco Bay, with moderate structural damage reported across the broader San Francisco Bay Area.
The earthquake caused an estimated $350,000 in damage, concentrated on Mare Island where vulnerable buildings amplified the shaking. Media reports noted a small tsunami and mild aftershocks. Multiple subsequent investigations attempted to determine the epicenter, source fault, and magnitude, placing it under or north of San Pablo Bay, but no consensus was reached.