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Peak Ground Acceleration (PGA) Joyner-Boore Attenuation Calculator

Easily calculate and compute peak ground acceleration (pga) joyner-boore attenuation calculator with accurate equations, live formulas, and expert guidance.

Earthquake moment magnitude.

Closest horizontal distance to surface projection of fault rupture.

NEHRP site classification shear velocity (e.g. 760 m/s for B/C rock, 360 m/s for stiff soil).

Calculated Result
0.01 g

Peak Ground Acceleration (PGA)

Peak Ground Acceleration (PGA)

0.01 g

Peak Ground Acceleration G

0.014

Peak Ground Acceleration Ms2

0.14

Effective Focal Distance Km

26

Site Vs30 Amplification Ratio

1.21

0.01 — g

Calculation Breakdown

  1. Applied FormulaPredicts peak horizontal ground acceleration (PGA) from earthquake magnitude, fault distance Rjb, and geotechnical shear wave velocity Vs30 using ground motion prediction attenuation equations.\log_{10} PGA = -0.70 + 0.23(M - 6) - \log_{10}\sqrt{R_{jb}^2 + 7.3^2} - 0.25\log_{10}(V_{s30}/760)

PGA Joyner-Boore GMPE Metric Output

Interactive visualization based on your current inputs

Calculated Value
0.00.30.50.81.0Peak Ground Acceleration (PGA)

What Is the Peak Ground Acceleration (PGA) Joyner-Boore Attenuation Calculator?

This tool computes peak ground acceleration (pga) joyner-boore attenuation calculator with high precision arithmetic.

How Does the Peak Ground Acceleration (PGA) Joyner-Boore Attenuation Calculator Work?

Predicts peak horizontal ground acceleration (PGA) from earthquake magnitude, fault distance Rjb, and geotechnical shear wave velocity Vs30 using ground motion prediction attenuation equations.

Peak Ground Acceleration (PGA) Joyner-Boore Attenuation Calculator Formula & Variables

The core mathematical equation utilized by this calculator is expressed as:

log⁡10PGA=−0.70+0.23(M−6)−log⁡10Rjb2+7.32−0.25log⁡10(Vs30/760)\log_{10} PGA = -0.70 + 0.23(M - 6) - \log_{10}\sqrt{R_{jb}^2 + 7.3^2} - 0.25\log_{10}(V_{s30}/760)

Predicts peak horizontal ground acceleration (PGA) from earthquake magnitude, fault distance Rjb, and geotechnical shear wave velocity Vs30 using ground motion prediction attenuation equations.

How to Use the Peak Ground Acceleration (PGA) Joyner-Boore Attenuation Calculator

  1. Enter your parameters into the designated input fields to calculate the result immediately.

Step-by-Step Example Calculation

Peak Ground Acceleration (PGA) Joyner-Boore Attenuation Calculator Example

Input Values:

momentMagnitudeMw:6.8
joynerBooreDistanceRjbKm:25.0
shearWaveVelocityVs30Ms:360.0
Worked Steps: Sample evaluation based on standard reference conditions.

Understanding Your Result

The calculated primary figure indicates the optimal or required g.

Factors That Affect the Result

  • Measurement tolerances, operational variance, and real-world conditions.

When Should You Use This Calculator?

  • Everyday budgeting, technical homework, professional estimation, and household projects.

Assumptions & Limitations

  • Assumes standard atmospheric or environmental parameters unless specified.

Frequently Asked Questions

Calculation Accuracy & Reference Note

Double-precision IEEE 754 arithmetic with validated empirical constants.

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