Earthquake Data Fields
Field Name | Field Type | Description |
---|---|---|
pbkey | Char(17) | A unique address identifier that is returned when an address match is made using the Master Location Dataset. |
eq_r0 | Integer | Count of R0 events* Note: Eq_R* describes aggregate earthquake event data in the
United States. The R numbers correspond to the Magnitude Scale.
|
eq_r1 | Integer | Count of R1 events* |
eq_r2 | Integer | Count of R2 events* |
eq_r3 | Integer | Count of R3 events* |
eq_r4 | Integer | Count of R4 events* |
eq_r5 | Integer | Count of R5 events* |
eq_r6 | Integer | Count of R6 events* |
eq_r7 | Integer | Count of R7 events* |
eq_r0_ge | Integer | Count of events >= R0* |
eq_r1_ge | Integer | Count of events >= R1* |
eq_r2_ge | Integer | Count of events >= R2* |
eq_r3_ge | Integer | Count of events >= R3* |
eq_r4_ge | Integer | Count of events >= R4* |
eq_r5_ge | Integer | Count of events >= R5* |
eq_r6_ge | Integer | Count of events >= R6* |
eq_r7_ge | Integer | Count of events >= R7* |
eqf_name | Char (80) | Name of fault |
eqf_dist | Double | Distance to closest fault in miles (up to 5 decimal precisions) |
eqf_sliprt | Char (15) | Amount of offset divided by time interval, normalized to millimeters per year (mm/yr). |
eqf_type | Char (25) | Fault type based on fault location |
eqf_sldrcd | Char (15) |
Four-character code with the first two characters indicating earthquake fault. The next two characters describe the slip direction:
|
eqf_age | Char (30) | Age of fault in years |
eqf_slpsns | Char (15) | Angle of dip of the fault and the relative direction of movement across the fault. |
eqf_dipdir | Char (15) | General direction of fault dip, which is the angle at which the fault is inclined from the horizontal plane. |
pml_zonegrade | Char (2) | Probable Maximum Loss Zone Grade – Currently only available for the state of California |
eqs_nehrp | Char (2) | Modified NEHRP Classification Note: Pitney Bowes has adopted a modified NEHRP
soil type classification, based on Site Classification Based on Geological
Genesis by Wen et al. (2008). For more information refer to the Modified
NEHRP Classification table below.
|
eqs_index | Double | Numeric value representing NEHRP classification |
newmadrid_dist | Double | Numeric value representing distance from the New Madrid Fault region |
Modified NEHRP Classification | Numerical Index | Shear-wave Velocity (Vs) (m/s) | Description |
---|---|---|---|
B | 1 | >760 | Most volcanic, plutonic, metamorphic and coarse grained sedimentary |
BC | 1.5 | 555-1000 | Vretaceous siltstones or mudstone |
C | 2 | 360-760 | Sedimentary rocks of Oligocener to Cretaceous age or younger coarse grained sedimentary rocks |
CD | 2.5 | 270-555 | Sedimentary rocks of Miocence and younger age. |
D | 3 | 180-360 | Younger alluvium |
DE | 3.5 | 90-270 | Fine grained alluvial and estuarine deposits along the coast |
E | 4 | <180 | Intertidal mud |