4.32, 12km WSW of Niland, CA

Table Of Contents

• Mainshock Details
  • USGS Products
  • Nearby Faults
• Sequence Details
  • Magnitude Vs. Time Plot
  • Aftershock Locations
  • Cumulative Number Plot
  • Magnitude-Number Distributions (MNDs)
• Significant Aftershocks
  • M4.34 1490.22 days after
  • M4.04 977.13 days after
  • M4.12 781.04 days after
  • M4.26 687.14 days after
  • M4.29 687.1 days after
  • M4.33 687.1 days after
  • M4.04 72.43 days after
  • M4.06 0.01 days after
  • M4.14 0 days after

Mainshock Details

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Information and plots in the section are taken from the USGS event page, accessed through ComCat.

USGS Products

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ShakeMap	Did You Feel It?
PAGER	Moment Tensor

Nearby Faults

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3 UCERF3 fault sections are within 10km of this event's hypocenter:

• Brawley (Seismic Zone) alt 2: 1.91km
• Elmore Ranch: 2.43km
• Brawley (Seismic Zone) alt 1: 3.83km

Sequence Details

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These plots show the aftershock sequence, using data sourced from ComCat. They were last updated at 2025/08/25 17:11:48 UTC, 1535.52 days after the mainshock.

1921 M≥0 earthquakes within 10 km of the mainshock's epicenter.

Magnitude Vs. Time Plot

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This plot shows the magnitude vs. time evolution of the sequence. The mainshock is ploted as a brown circle, foreshocks are plotted as magenta circles, and aftershocks are plotted as cyan circles.

First Week	First Month	To Date

Aftershock Locations

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Map view of the aftershock sequence, plotted as cyan circles. The mainshock and foreshocks are plotted below in brown and magenta circles respectively, but may be obscured by aftershocks. Nearby UCERF3 fault traces are plotted in gray lines, and the region used to fetch aftershock data in a dashed dark gray line.

First Day	First Week	To Date

Cumulative Number Plot

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This plot shows the cumulative number of M≥0 aftershocks as a function of time since the mainshock.

Magnitude-Number Distributions (MNDs)

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These plot shows the magnitude-number distribution of the aftershock sequence thus far. The left plot gives an incremental distribution (the count in each magnitude bin), and the right plot a cumulative distribution (the count in or above each magnitude bin).

Incremental MND	Cumulative MND

Significant Aftershocks

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Aftershocks(s) with M≥6 or with M≥M_Mainshock-1.

M4.34 1490.22 days after

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Information and plots in the section are taken from the USGS event page, accessed through ComCat.

USGS Products

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ShakeMap	Did You Feel It?	PAGER

Nearby Faults

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3 UCERF3 fault sections are within 10km of this event's hypocenter:

• Brawley (Seismic Zone) alt 1: 2.93km
• Brawley (Seismic Zone) alt 2: 3.23km
• Elmore Ranch: 6.34km

M4.04 977.13 days after

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Information and plots in the section are taken from the USGS event page, accessed through ComCat.

USGS Products

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ShakeMap	Did You Feel It?
PAGER	Moment Tensor

Nearby Faults

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3 UCERF3 fault sections are within 10km of this event's hypocenter:

• Brawley (Seismic Zone) alt 1: 2.85km
• Brawley (Seismic Zone) alt 2: 3.69km
• Elmore Ranch: 9.67km

M4.12 781.04 days after

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Information and plots in the section are taken from the USGS event page, accessed through ComCat.

USGS Products

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ShakeMap	Did You Feel It?
PAGER	Moment Tensor

Nearby Faults

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3 UCERF3 fault sections are within 10km of this event's hypocenter:

• Brawley (Seismic Zone) alt 2: 3.31km
• Elmore Ranch: 9.14km
• Brawley (Seismic Zone) alt 1: 9.4km

M4.26 687.14 days after

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Information and plots in the section are taken from the USGS event page, accessed through ComCat.

USGS Products

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ShakeMap	Did You Feel It?
PAGER	Moment Tensor

Nearby Faults

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3 UCERF3 fault sections are within 10km of this event's hypocenter:

• Brawley (Seismic Zone) alt 2: 3.13km
• Elmore Ranch: 7.17km
• Brawley (Seismic Zone) alt 1: 9km

M4.29 687.1 days after

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Information and plots in the section are taken from the USGS event page, accessed through ComCat.

USGS Products

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ShakeMap	Did You Feel It?
PAGER	Moment Tensor

Nearby Faults

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3 UCERF3 fault sections are within 10km of this event's hypocenter:

• Brawley (Seismic Zone) alt 2: 1.81km
• Elmore Ranch: 7.42km
• Brawley (Seismic Zone) alt 1: 7.79km

M4.33 687.1 days after

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Information and plots in the section are taken from the USGS event page, accessed through ComCat.

USGS Products

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ShakeMap	Did You Feel It?
PAGER	Moment Tensor

Nearby Faults

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3 UCERF3 fault sections are within 10km of this event's hypocenter:

• Brawley (Seismic Zone) alt 2: 2.65km
• Elmore Ranch: 6.97km
• Brawley (Seismic Zone) alt 1: 8.53km

M4.04 72.43 days after

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Information and plots in the section are taken from the USGS event page, accessed through ComCat.

USGS Products

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ShakeMap	Did You Feel It?	PAGER

Nearby Faults

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3 UCERF3 fault sections are within 10km of this event's hypocenter:

• Brawley (Seismic Zone) alt 1: 1.67km
• Brawley (Seismic Zone) alt 2: 4.68km
• Elmore Ranch: 7.56km

M4.06 0.01 days after

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Information and plots in the section are taken from the USGS event page, accessed through ComCat.

USGS Products

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ShakeMap	Did You Feel It?
PAGER	Moment Tensor

Nearby Faults

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3 UCERF3 fault sections are within 10km of this event's hypocenter:

• Elmore Ranch: 1.8km
• Brawley (Seismic Zone) alt 2: 2.65km
• Brawley (Seismic Zone) alt 1: 3.02km

M4.14 0 days after

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Information and plots in the section are taken from the USGS event page, accessed through ComCat.

Nearby Faults

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3 UCERF3 fault sections are within 10km of this event's hypocenter:

• Brawley (Seismic Zone) alt 2: 0.52km
• Elmore Ranch: 1.23km
• Brawley (Seismic Zone) alt 1: 5.2km