MASW and ReMi: Unlocking Subsurface Insights with DoReMi Seismograph

In the realm of geophysical exploration, two advanced seismic techniques—MASW (Multi-Channel Analysis of Surface Waves) and ReMi (Refraction Microtremor)—are leading tools for mapping shallow shear-wave velocity (Vs) profiles. These methods provide critical data for applications ranging from seismic hazard assessments to infrastructure development and resource exploration. With the DoReMi Seismograph, professionals gain access to a powerful, modular, and precision-driven solution, complete with free analysis software for seamless operation in diverse environments.

What is MASW (Multi-Channel Analysis of Surface Waves)?

MASW is an active-source seismic technique that analyzes surface waves generated by an external source, such as a sledgehammer, weight drop, or vibroseis truck. The energy produced by these sources travels along the ground surface as Rayleigh waves, and MASW records their dispersion characteristics to calculate shear-wave velocity (Vs) at different depths.

Key Highlights of MASW:

• Source Type: Active (sledgehammer, weight drop, vibroseis)
• Depth Penetration: Depends on array length, sensor frequency, and energy source
• Applications:
  • Seismic hazard assessment
  • Subsurface characterization
  • Soil stiffness evaluation
  • Infrastructure foundation studies

MASW excels in environments where controlled energy sources can be applied, offering reliable data even in noisy urban settings.

What is ReMi (Refraction Microtremor)?

ReMi is a passive-source seismic technique that relies on ambient noise or microtremors generated naturally by environmental activities, such as traffic, wind, or machinery. Unlike MASW, ReMi doesn’t require an active energy source, making it ideal for sites where active sources cannot be used.

Key Highlights of ReMi:

• Source Type: Passive (environmental noise, microtremors)
• Depth Penetration: Primarily depends on array length and sensor frequency
• Applications:
  • Deep subsurface profiling
  • Seismic hazard mapping
  • Geological fault studies
  • Urban development site assessments

ReMi surveys are particularly advantageous in environments with high background noise levels.

How Do MASW and ReMi Differ?

Feature	MASW	ReMi
Source	Active (artificial source)	Passive (ambient noise)
Depth Penetration	Shallow to moderate depth	Deeper depths
Data Quality	Controlled, higher resolution	Natural, dependent on ambient noise
Best Used For	Urban projects, shallow investigations	Deep subsurface studies

While MASW excels in controlled, shallow-depth investigations, ReMi thrives in scenarios where deep subsurface profiling is required.

DoReMi Seismograph: The All-in-One Solution

The DoReMi Seismograph is a cutting-edge, modular digital telemetry system designed for both MASW and ReMi surveys. It combines advanced hardware capabilities with user-friendly software, ensuring high-precision data acquisition in any operational setting.

Key Features of DoReMi Seismograph:

• Modular Design: Scalable to support 1 to 255 channels, allowing flexible configurations for diverse projects.
• Embedded Recording Electronics: Electronics are embedded in the cable, reducing electromagnetic interference.
• Lightweight & Portable: Easily transported with a cable wheeler, ensuring smooth deployment in remote sites.
• Integrated Battery System: Built-in rechargeable battery ensures continuous and independent operation.
• Noise Reduction: Digitalization near the geophone minimizes noise and prevents data loss or crosstalk.
• Flexible Sensor Integration: Supports 4.5 Hz geophones, downhole sensors (SS-BH-5C), and other seismic equipment.
• Free Analysis Software: Compatible with any processing software, simplifying data management and interpretation.

Advanced Software for Seamless Operation

The DoReMi Seismograph is complemented by advanced software tools, designed to streamline on-site data quality checks and post-processing workflows.

Key Software Capabilities:

• Pre-Shot Noise Monitoring: Ensures data integrity before acquisition.
• Downhole & Surface Data Management: Simplifies different acquisition scenarios.
• Signal Inversion & Overlapping: For SH shots and advanced processing.
• Data Filtering & Spectral Analysis: Advanced tools for FK and FV analysis.
• Roll-Along Acquisition: Simplifies large-area surveys.
• HVSR Preview: Horizontal-to-Vertical Spectral Ratio preview for subsurface mapping.
• Multi-Language Support: Available in English, Italian, and Chinese.

Applications of DoReMi Seismograph

• Seismic Hazard Assessment: Earthquake resilience site characterization.
• Geophysical Exploration: MASW, ReMi, Refraction, Reflection, and Downhole surveys.
• Infrastructure Projects: Foundation analysis and underground mapping.
• Resource Exploration: Aquifer detection, oil and gas reservoir profiling.
• Urban Development: Roadbed evaluations and soil stiffness assessments.

Data Outputs from DoReMi Seismograph

1. 1D Shear Wave Velocity Profile:
   • Vertical shear-wave velocity analysis for site characterization.
2. 2D Shear Wave Velocity Profile:
   • Comprehensive subsurface mapping when multiple acquisitions are performed.

These outputs are essential for geotechnical engineers, seismologists, and urban planners in making informed decisions.

Why Choose DoReMi Seismograph for MASW and ReMi Surveys?

• Dual Capability: Seamlessly supports both MASW and ReMi techniques.
• High Precision: Noise-free, reliable data acquisition.
• Scalable Design: Flexible configurations from 1 to 255 channels.
• Advanced Software Integration: Simplified analysis and data management.
• Portability: Lightweight design with modular architecture.
• Expert Support: Dedicated training, support, and consultation from QuakeLogic.

Conclusion

The DoReMi Seismograph by QuakeLogic represents a state-of-the-art solution for MASW and ReMi seismic surveys, offering unmatched flexibility, precision, and reliability. Whether it’s mapping shallow shear-wave velocity using MASW or profiling deeper subsurface layers with ReMi, DoReMi delivers results you can trust.

Experience precision, reliability, and innovation with the DoReMi Seismograph—your trusted partner in seismic exploration.

📞 For more information or to request a demo, contact us at:
Phone: +1-916-899-0391
Email: sales@quakelogic.net
Website: www.quakelogic.net

Discover seismic monitoring excellence with QuakeLogic’s DoReMi Seismograph!