20 km ESE of Silver Springs, Nevada

Magnitude5.5

Depth13.1 km

Time 2026-04-14T01:29:12.123000Z UTC: 2026-04-14T01:29:12.123000Z

USGS ID nn00914068

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Ground Shaking Intensities — Interpolated ShakeMap MMI

9 sites

Location	MMI	Description	Dist (km)	Dist (mi)
Silver Springs NV	V	Moderate	21	13
Yerington NV	V	Moderate	41	25
Stagecoach NV	IV	Light	32	20
Fallon NV	IV	Light	25	16
Sparks NV	IV	Light	68	42
Smith Valley NV	IV	Light	68	42
Dayton NV	IV	Light	52	32
Fernley NV	IV	Light	37	23
Sun Valley NV	IV	Light	72	45

Seismic Station Observed MMI

MMI values are derived directly from observed ground motion measurements at seismic stations and are not spatially interpolated.

3 stations

Station	Network	MMI	Description	Dist (km)	Dist (mi)
Pine Nut, Nevada w84 (NN.PNT)	NN	V	Moderate	58	36
Donner Summit, California (NN.DON)	NN	IV	Light	113	70
Yerington, Nevada w84gm (NN.YER)	NN	IV	Light	44	27

Engineering Ground Motion Parameters

GMPE predictions provide an independent check on the ShakeMap interpolated intensities above. ShakeMap relies on seismic station recordings; in areas with sparse station coverage — or for large teleseismic events and earthquakes outside dense West Coast networks — ShakeMap MMI can be inaccurate. A significant difference between ShakeMap and GMPE estimates is a signal that the ShakeMap result should be treated as preliminary. Also includes site Vs30 values and raw ground motion parameters (PGA/PGV).

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Est. Vs30 Values

Estimated shear-wave velocity in the upper 30 m used in GMPE calculations. Ref. column shows the 760 m/s rock-site reference for comparison.

Location	Ref. (760 m/s)	Est. Vs30 (m/s)	Source	Dist (km)	Dist (mi)
Silver Springs NV	760	322	Wald & Allen / UCVM	21	13
Yerington NV	760	207	Wald & Allen / UCVM	41	25
Stagecoach NV	760	370	Wald & Allen / UCVM	32	20
Fallon NV	760	201	Wald & Allen / UCVM	25	16
Sparks NV	760	251	Wald & Allen / UCVM	68	42
Smith Valley NV	760	319	Wald & Allen / UCVM	68	42
Dayton NV	760	489	Wald & Allen / UCVM	52	32
Fernley NV	760	247	Wald & Allen / UCVM	37	23
Sun Valley NV	760	393	Wald & Allen / UCVM	72	45

MMI vs Distance — Default Vs30 (760 m/s)

All methods using the 760 m/s rock-site reference. ShakeMap values are independent of Vs30.

MMI vs Distance — Est. Vs30

GMPEs use the Est. Vs30 values shown in the table above. ShakeMap values are independent of Vs30.

GMPE Performance — Station Observations

Statistics computed by comparing each GMPE's predicted MMI against ShakeMap observed MMI at seismic stations. Bias = mean(observed − predicted). Lower RMSE indicates better overall agreement with instrumental measurements.

GMPE	Bias	Sigma	RMSE	N Stations
ASK14	+1.39	0.55	1.49	99
BSSA14	+1.17	0.68	1.36	99
CY14	+1.37	0.51	1.46	99
CB14	+1.11	0.74	1.33	99

Bias > 0: GMPE underestimated shaking at stations. Bias < 0: GMPE overestimated shaking.

Peak Ground Motion — Seismic Station Observations

Recorded PGA and PGV at seismic stations, sorted by highest PGA. Top 25 stations shown. MMI (PGA) and MMI (PGV) are independent conversions via Worden et al. (2012) GMICE.

Station	Dist (km)	PGA (g)	MMI (PGA)	PGV (cm/s)	MMI (PGV)
Buffalo Canyon, Nevada w84gm (NN.BFC)	71	0.0280	IV	1.224	V
Donner Summit, California (NN.DON)	113	0.0206	IV	2.832	VI
Yerington, Nevada w84gm (NN.YER)	44	0.0141	III	0.892	IV
Bishop Manogue Catholic High School, Reno, NV (NN.BMHS)	66	0.0134	III	1.189	V
Thunderbird Lodge, Lake Tahoe, NV (NN.TBRD)	82	0.0131	III	0.805	IV
Queen Bee, Mono County, California (NN.QNBC)	127	0.0091	II	0.530	IV
Meyers - South Lake Tahoe (CE.66038)	103	0.0080	II	0.530	IV
Pah Rah Range, Nevada w84gm (NN.PAH)	53	0.0079	II	0.635	IV
TV Hill 1, Hawthorne, NV (NN.TVH1)	100	0.0073	II	0.562	IV
Washoe Valley, Nevada;Laurence Kaplan Property (NN.WASH)	66	0.0073	II	0.361	III
Bald Mtn, NV (NN.BALD)	73	0.0070	II	0.442	IV
Bunker Hill, Placer County, CA (NN.BUNK)	122	0.0069	II	0.296	III
Zephyr Cove, Lake Tahoe, Nevada (NN.ZPR)	88	0.0065	II	0.445	IV
Highway Maintenance Yard (NP.2021)	162	0.0064	II	0.286	III
Sage Hen site 5, Independence Lake, CA (NN.SAG5)	113	0.0063	II	0.422	III
Pyramid Lake 2 (NN.PYM2)	112	0.0061	I	0.380	III
Rockland Comm. Site (NN.RKLD)	77	0.0059	I	0.437	III
Kaiserville, Nevada w84gm (NN.KVN)	84	0.0056	I	0.204	III
Minden/Gardnerville Fire Stn RT130-ANSS w84gm (NN.MND1)	78	0.0055	I	0.621	IV
Sierra Vista (NC.MSVB)	186	0.0052	I	0.174	III
Weber Reservoir, near Camino (BK.WEBR)	161	0.0052	I	0.192	III
Weller Cave, Western Cave Conservancy, Sutter Creek, CA (BK.WELL)	179	0.0051	I	0.242	III
Washoe County DEM, Nevada (NN.WDEM)	74	0.0050	I	0.483	IV
Verdi Peak, California (NN.VPK)	90	0.0049	I	0.459	IV
Lower Ebbet's Pass, California (NN.EBPB)	109	0.0048	I	0.271	III

Source: USGS ShakeMap station recordings (view ShakeMap). PGA in g (fraction of gravitational acceleration); PGV in cm/s. The observed MMI shown on the map uses ShakeMap's reported instrumental intensity where available, or max(MMI from PGA, MMI from PGV) otherwise.