Max Est. MMI
81 km SSW of Alberto Oviedo Mota, B.C., MX
Ground Shaking Intensities — Interpolated ShakeMap MMI
3 sites| Location | MMI Description |
|---|---|
|
San Vicente
MX |
Not felt(I) |
|
Fraccionamiento del Valle
MX |
Not felt(I) |
|
Ejido Doctor Alberto Oviedo Mota (El Indiviso)
MX |
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 |
|---|---|
| Valle de la Trinidad (BC.VTX) | Not felt(I) |
| Rancho Alamar- (BC.ALAMX) | Weak(II) |
| Ojos Negros (BC.OJONX) | 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) |
|---|---|---|
|
San Vicente
MX |
760 | 317 |
|
Fraccionamiento del Valle
MX |
760 | 271 |
|
Ejido Doctor Alberto Oviedo Mota (El Indiviso)
MX |
760 | 185 |
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 | +0.05 | 0.18 | 0.19 |
| BSSA14 | +0.05 | 0.18 | 0.19 |
| CY14 | +0.05 | 0.18 | 0.19 |
| CB14 | +0.05 | 0.18 | 0.19 |
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) |
|---|---|---|---|---|
| Rancho Alamar- (BC.ALAMX) | 0.0036 | Not felt(I) | 0.050 | Not felt(I) |
| Campo Elementary School (CI.CPO) | 0.0026 | Not felt(I) | 0.043 | Not felt(I) |
| Riito (BC.RITX) | 0.0019 | Not felt(I) | 0.030 | Not felt(I) |
| Valle de la Trinidad (BC.VTX) | 0.0019 | Not felt(I) | 0.022 | Not felt(I) |
| Fire Station (NP.5491) | 0.0017 | Not felt(I) | 0.049 | Not felt(I) |
| Ojos Negros (BC.OJONX) | 0.0015 | Not felt(I) | 0.019 | Not felt(I) |
| Campo (CE.02496) | 0.0014 | Not felt(I) | 0.020 | Not felt(I) |
| Dulzura (CI.DZA) | 0.0012 | Not felt(I) | 0.019 | Not felt(I) |
| UABC Campus Mexicali (BC.UABX) | 0.0012 | Not felt(I) | 0.026 | Not felt(I) |
| CERRO PRIETO (BC.CPX) | 0.0012 | Not felt(I) | 0.030 | Not felt(I) |
| El Doctor (BC.DOCTX) | 0.0011 | Not felt(I) | 0.026 | Not felt(I) |
| Ejido Aguascalientes (BC.AGSX) | 0.0011 | Not felt(I) | 0.020 | Not felt(I) |
| Guadalupe Victoria (BC.GUVIX) | 0.0010 | Not felt(I) | 0.010 | Not felt(I) |
| Rancho Hardy (BC.RHX) | 0.0009 | Not felt(I) | 0.012 | Not felt(I) |
| El Centro Array 11, McCabe School (NP.5058) | 0.0009 | Not felt(I) | 0.027 | Not felt(I) |
| Cuyamaca Peak (CI.CYP) | 0.0009 | Not felt(I) | 0.013 | Not felt(I) |
| Yuha Desert (CI.YUH2) | 0.0008 | Not felt(I) | 0.009 | Not felt(I) |
| Lyon's Peak (CI.LYP) | 0.0007 | Not felt(I) | 0.007 | Not felt(I) |
| El Monte County Park (CI.EML) | 0.0006 | Not felt(I) | 0.008 | Not felt(I) |
| Barrett (CI.BAR) | 0.0006 | Not felt(I) | 0.008 | Not felt(I) |
| Rumorosa (BC.RMX) | 0.0006 | Not felt(I) | 0.009 | Not felt(I) |
| El Centro (CI.ELO) | 0.0005 | Not felt(I) | 0.013 | Not felt(I) |
| Dos Picos County Park (CI.DPP) | 0.0005 | Not felt(I) | 0.010 | Not felt(I) |
| Wister Waterfowl (CI.WWF) | 0.0004 | Not felt(I) | 0.010 | Not felt(I) |
| Julian Eagle Mine (CI.JEM) | 0.0004 | Not felt(I) | 0.007 | Not felt(I) |