Interpex IX1D is a 1D interpretation software package designed for a variety of geophysical methods. It specializes in of resistivity, induced polarization (IP), and electromagnetic (EM) data.
IX1D includes specialized modules for interpreting electromagnetic variations:
Nevertheless, to dismiss the IX1D V350 as obsolete would be a mistake. For its intended application—layered earth interpretation for groundwater exploration, engineering site characterization, and shallow environmental studies—it remains remarkably effective. It is lean, stable, and requires minimal computational resources, making it ideal for fieldwork on rugged laptops. The software teaches a fundamental geophysical truth: that a well-constrained 1D model, properly understood, is often far more valuable than a poorly resolved 3D inversion.
: Designed for Windows environments (XP through Windows 10).
Features mathematical modeling for deeper structural investigation using apparent resistivity and impedance phase. interpex ix1d v350
Beyond its mathematical core, the software’s practical utility is enhanced by several key features. The “forward modeling” mode is exceptional for educational purposes and hypothesis testing, allowing users to build synthetic geological models (e.g., a resistive layer over a conductive aquifer) and instantly view the resulting apparent resistivity curve. Critically, the V350 version introduced advanced capabilities like the handling of induced polarization (IP) effects, allowing for the joint interpretation of resistivity and chargeability data—a powerful combination for mineral exploration. The ability to import and export data in multiple formats, alongside a manual "picking" routine to estimate asymptotic resistivities, streamlines what would otherwise be tedious calculations.
Interpex IX1D v3.50 bridges the gap between raw field measurements and actionable geological insights. By providing a transparent, interactive environment for 1D inversion, it ensures that geophysicists can produce accurate subsurface models with confidence.
Keywords integrated naturally: Interpex IX1D v350, 1D resistivity inversion, VES interpretation, geophysical software, layered earth modeling, DC sounding, Schlumberger array, apparent resistivity curve, Levenberg-Marquardt inversion.
Click Invert > Automatic . The v350 engine iterates, reducing the RMS misfit. Watch the convergence plot—v350 provides real-time feedback. A typical final RMS under 5% is excellent for field data. Interpex IX1D is a 1D interpretation software package
The name “v3.5.0” refers to a refined version of the IX1D v3 engine. Newer versions of the software are named IX1Dv2.exe and IX1Dv3.exe to distinguish them from older installations, reflecting ongoing updates in the development environment.
By calculating the theoretical response of a layered ground (forward modeling) and iteratively adjusting layer thicknesses and resistivities to match field data (inverse modeling), IX1D helps professionals map groundwater tables, bedrock depth, and contaminant plumes. Supported Geophysical Methods
This creates a "smooth" model with many thin layers, which is excellent for identifying general trends and depth to basement without needing a complex starting model.
+------------------------------------+-------------------------------------+ | DATA PLOT (Left Window) | MODEL VIEW (Right Window) | | | | | Apparent | Depth | | Resistivity | (m) | | ^ | | | | | * * | +-------+ [Layer 1: Dry Sand] | | | * * | | | | | | * | +-----------+ [Layer 2: Clay] | | | * | | | | | +-------------------> | +---+ [Layer 3: Bedrock] | | Spacing | | +------------------------------------+-------------------------------------+ : Designed for Windows environments (XP through Windows 10)
: Compatible with common DC resistivity arrays like Wenner, Schlumberger, Dipole-dipole, and Pole-pole.
First, its is a major advantage. The software uses an adaptive linear digital filter, which ensures computational stability and accuracy, even with high resistivity contrasts of up to 10,000:1 between layers. This is paired with a stable inversion approach based on a ridge regression (Marquardt-Levenberg algorithm) for reliable convergence.
The output includes: