Max Est. MMI
45 km SE of Beatty, Nevada
Ground Shaking Intensities — Interpolated ShakeMap MMI
3 sites| Location | MMI Description |
|---|---|
|
Beatty
NV |
Not felt(I) |
|
Pahrump
NV |
Not felt(I) |
|
Death Valley
CA |
Not felt(I) |
Seismic Station Observed MMI
MMI values are derived directly from observed ground motion measurements at seismic stations and are not spatially interpolated.
| Station | MMI Description |
|---|---|
| Amargosa Valley Town Office, NV, CEMP (QN.AVTO) | Weak(II) |
| Topopah Spring, Nevada, USA (US.TPNV) | Not felt(I) |
| Funeral Mountains, CA. (GPS 12/05/2000) w84 (NN.FMT) | Not felt(I) |
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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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).
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) |
|---|---|---|
|
Beatty
NV |
760 | 417 |
|
Pahrump
NV |
760 | 359 |
|
Death Valley
CA |
760 | 228 |
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 Residual — Observed − Predicted MMI
Signed residual at each seismic station. Positive values mean the GMPE underestimated shaking; negative values mean it overestimated. The dashed line at zero indicates perfect agreement.
GMPE Predicted vs. Observed MMI at Seismic Stations
Each point is one seismic station. Points on the dashed 1:1 line indicate perfect agreement; above the line = GMPE underestimated shaking; below = overestimated.
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 |
|---|---|---|---|
| ASK14 | +0.07 | 0.25 | 0.26 |
| BSSA14 | +0.07 | 0.28 | 0.29 |
| CY14 | +0.06 | 0.25 | 0.25 |
| CB14 | +0.07 | 0.25 | 0.26 |
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 | PGA (g) | MMI (PGA) | PGV (cm/s) | MMI (PGV) |
|---|---|---|---|---|
| Amargosa Valley Town Office, NV, CEMP (QN.AVTO) | 0.0079 | Not felt(I) | 0.124 | Weak(II) |
| Furnace Creek (CI.FUR) | 0.0040 | Not felt(I) | 0.069 | Weak(II) |
| Beatty Postal Station, NV, CEMP (QN.BTPS) | 0.0015 | Not felt(I) | 0.034 | Not felt(I) |
| Funeral Mountains, CA. (GPS 12/05/2000) w84 (NN.FMT) | 0.0013 | Not felt(I) | 0.022 | Not felt(I) |
| Topopah Spring, Nevada, USA (US.TPNV) | 0.0011 | Not felt(I) | 0.030 | Not felt(I) |
| Shoshone (CI.SHO) | 0.0005 | Not felt(I) | 0.010 | Not felt(I) |
| Greenwater Valley, CA. (GPS 03/05/2015) w84gm (NN.GWY) | 0.0005 | Not felt(I) | 0.007 | Not felt(I) |
| Angel Comm. Site, Clark County (NN.AGLV) | 0.0005 | Not felt(I) | 0.007 | Not felt(I) |
| Hell's Gate, California w84 (SN.HEL) | 0.0005 | Not felt(I) | 0.007 | Not felt(I) |
| Indian Springs High School, NV, CEMP (QN.ISHS) | 0.0004 | Not felt(I) | 0.009 | Not felt(I) |
| Tecopa, CA, CEMP (QN.TCPC) | 0.0004 | Not felt(I) | 0.011 | Not felt(I) |
| 7433 Soaring Heights Ave, Las Vegas (NN.WTNK) | 0.0003 | Not felt(I) | 0.004 | Not felt(I) |
| Rogers Peak (CI.RPK) | 0.0003 | Not felt(I) | 0.007 | Not felt(I) |
| Marble Canyon, California. (GPS 12/06/2000) w84 (NN.MCA) | 0.0003 | Not felt(I) | 0.004 | Not felt(I) |
| Red Rock Park, Nevada w84gm (NN.RRK) | 0.0003 | Not felt(I) | 0.007 | Not felt(I) |
| Queen of Sheba Mine, CA. (GPS 01/17/2001) w84gm (NN.QSM) | 0.0003 | Not felt(I) | 0.004 | Not felt(I) |
| Grapevine Ranger Station (CI.GRA) | 0.0003 | Not felt(I) | 0.007 | Not felt(I) |
| Gold Mountain, NV, USA (NN.GMN) | 0.0002 | Not felt(I) | 0.009 | Not felt(I) |
| Clark County Firehouse 12; ANSS SM w84gm (NN.CC12) | 0.0002 | Not felt(I) | 0.005 | Not felt(I) |
| Fish Rocks (CI.FSR) | 0.0002 | Not felt(I) | 0.005 | Not felt(I) |
| Hyde High School, LLNL/ANSS BB+SM w84 (NN.HYDE) | 0.0002 | Not felt(I) | 0.008 | Not felt(I) |
| Sarcobatus Flats, NV, CEMP (QN.SCFL) | 0.0002 | Not felt(I) | 0.006 | Not felt(I) |
| Las Vegas Fire Station (NN.LV04) | 0.0002 | Not felt(I) | 0.006 | Not felt(I) |
| Summerlin Fire Station 7, West LV (SUMR) (NN.LV07) | 0.0002 | Not felt(I) | 0.004 | Not felt(I) |
| Fire Station (NP.1679) | 0.0001 | Not felt(I) | 0.003 | Not felt(I) |