Since 1994


June 2024 News

Inductive Thin-Sheet Inversion
Eikon's thin-sheet simulation algorithm with only an inductive response is based upon the mathematics presented by P.Annan in his PhD thesis. Our algorithm is not a re-work of the old UofT Plate program written by Bloore and Dyke in the 1980's and improved by Groom in the 1990's... However, initial calibration tests were made against the 1990's version as well as our modified version of P.Walker's VHPlate algorithm which had had basic checks against several other thin sheet algorithms during the 1990's.

In EMIGMA, a non-interacting layered background was enabled some years ago to allow the inclusion for weathered and conductive cover during interpretation as well as an only moderately resistive host. This app allowed for utilizing either a direct in time domain solution for the plate or a frequency to time transform solution if the bandwidth was critical to interpretation. The forward application is also provided for FEM data.

This latter version is the forward basis of Eikon's plate inversion app which allows both TDEM and FDEM data. In the app, for TDEM, the user may select the two types for forward approaches and the band width in the transform version. The background field is to be set by the user (see suggestions below) and the inversion is then performed on the secondary field. If no background is required then this is allowed. There are two completely different inversion algorithms provided. The first is based upon the traditional simplex approach and the second our well used and proven Trust Region approach.

Multiple sources and multiple receiver components are allowed and each TX-RX component may have its own selection of time windows or frequencies. The user may also select for each component the portion of the survey which will be utilized in the inversion. All of this may sound more elaborate than necessary but we have been developing and testing the application for more than 3 years now and many implementations were found necessary while testing with survey data from surveys around the world. Some implementations are made specifically for certain specialized survey configurations.

The application is enabled for ground, borehole and airborne data and allows for up to 6 plates in the inversion model. We suggest using our forward and inverse 1D modeling for setting the background. The 1D inversion allows to invert for a best 1D model for many stations which is very practical when working particularly with airborne data. We also suggest some preliminary forward modeling to utilize as starting models in the inversion. All parameters of the plates may be constrained.

We tested the software on data from a wide range of equipment for ground, borehole and airborne surveys. We have waited for release until we had sufficient experience utilizing the app in our consulting work for the past six months. For airborne data, we have utilized it for VTEM, Xcite and SkyTEM all collected within the last five years.

We now offer this as a service.

One Dimensional Layered Earth Models from a 3D source
These algorithms are fundamental to all of our EM algorithms and inversions including IP, Resistivity, CSEM, FDEM and TDEM. Not only do they provide the background fields for the computations but for algorithms which provide interactions with the background, they produce the Greens functions to produce the secondary fields at the receivers due the buried structures.

We have made a huge leap in the accuracy and speed of these computations. This affects such things as receivers near a loop or grounded wire as well as receivers near 3D models. Also, this improves the accuracy of low frequency calculations as well as receivers far from the source of the secondary fields. With regard to computation speed, in many cases, computation times are dramatically reduced due to the user of multi-cores and other computation aspects of the new generations of CPU's.

3D Magnetic Inversion
The new generation of processors such as the AMD Ryzen processors, extend substantially the potential size and speed of inversion applications. Our inversion applications including the magnetic inversion utilize a direct matrix approach rather than the more common "hunt and seek" approaches. Therefore, we have upgraded this algorithm to enable much larger inversion problems.

For example, our FFT and DFT algorithms for generating derivatives produce a very accurate vertical gradient. Combining this gradient with the total field produces better depth estimates from the inversion but requires an increased size for the inversion app. Also, drone surveys produce much higher spatial resolutions and can sometimes produce very large datasets larger than towed or stinger helicopter surveys. These developments have required us to enhance our magnetic inversion app to handle such situations. Additionally, new magnetic vector drone surveys can be even larger.

We will soon be adding inversion capabilities for borehole magnetic surveys which will lead to the ability invert borehole data with ground and/or airborne data. At present, you can jointly invert your ground and airborne data.

CSEM Processing, Modeling and Inversion
We have augmented our 3D CSEM inversion in our EMIGMA V11 release.

We continue our work on land based CSEM to provide a comprehensive set of tools to allow proper processing and interpretation of geophysical surveys with a grounded transmitter utilizing both magnetic and electric measurements. This includes proper processing and interpretation of so-called CSAMT.

Along with these developments, you have been able for the past few years to utilize our 3D inversion allowing for: a) multiple transmitters b) multi-component magnetic and electric measurements without the need to contract to an impedance and c) many receivers on multiple survey lines. The inversion is multi-core and utilizes array processing techniques and new techniques in inversion.

The non-linear approximator (LN) algorithm offers improved results in areas of high background resistivities. Most electric field inversion applications only provide a Born scattering approach whether intentionally or not. In V11, we have reached out more towards the full potential of this algorithm in an inversion app. The algorithm is very fast and accurate for forward results but applying this approach to inversion is not as straightforward as it may seem. Thus, we are happy with our progress in this direction and find it now much more useful in our consulting work.

EMIGMA is constructed upon a relational database structure. As such, it was intended for joint interpretation of multiple data types. As the inversion techniques have improved in their usefulness, it has become necessary to improve the visualization inversions as well as integration in the visualizer of inversions and models from different types of survey data. For example, visual integration of IP and TDEM models with magnetic inversions. It has also become necessary to improve the speed and stability of visualization large inversions.

We have also added processing of inversions in order to reduce the inversions to the critical portions for visualization in EMIGMA as well as export to CAD models for the geologists. We have also added the ability to produce cross sections for viewing in EMIGMA and depth sections for viewing in QCTool.

There have also been improvements and extensions to our 2D section viewer, Survey Editor viewer and Grid Presentation tools.

Posted on 2024-06-17 15:32:14


Title Date Summary
June 2024 News20 Jun 2024

EMIGMA V11 released. New 3D thin-sheet plate inversion with integrated layered background. Improvements and extensions to all the 3D Inversion applications. Accuracy improvements to both inductive and galvanic 3D simulation algorithms. Updates to online HELP, and more.

(full article)
March 2023 News 15 Mar 2023

We are proud to announce the release of EMIGMA V10.1 geophysics software. Many improvements have been made to its various modules.

July 2022 - EMIGMA V10 and QCTool V5.0.0 25 Jul 2022

Details of QCTool upgrades may be found on the QCTool website More than 2 years of development have gone into the upgrades in EMIGMA V10

(full article)
July 2020 News 8 Jul 2020

Many EM simulation, processing and filtering algorithms have been augmented in our EMIGMA geophysics software.

(full article)
March 2020 - EMIGMA V9.5.5 now available 11 Mar 2020

We are pleased to announce that a new version of our EMIGMA geophysics software has been released. It includes many additions to the inversion, simulation and visualization tools.

Oct 2019 - 3D Resistivity Inversion 15 Oct 2019

We have completed an extensive upgrade to the 3D resistivity inversion in our geophysics software to allow both surface to borehole and borehole to borehole data.

(full article)
June 2019 - QCTool new features 12 Jun 2019

Many new features have been recently added to our QCTool software that will aid in processing geophysics data.

(full article)
Jan 2019 - Magnetic Compensation 22 Apr 2019

We have released a new version of our aeromagnetic processing and magnetic compensation geophysics software. The new version is suitable for airborne, ground and marine surveys.

(full article)
Oct 2017– CSEM and V9.5 release 6 Oct 2017

We are pleased to announce the release of V9.5 of our geophysics software effective October 5, 2017. This past year, we have enabled the use of Land Based CSEM survey interpretation.

(full article)
Oct 2016 - Release of Version 9.1 25 Oct 2016

While there are many minor improvements and additions to this version of our geophysics software, we wish to touch on only IP modeling, TDEM inversion and the inversion viewer.

(full article)
July 2016 - Land Based CSEM 27 Jul 2016

Our geophysics software now supports land based CSEM including data processing, editing , plotting, gridding, modeling (synthetic data) and 1D and 3D inversion.

(full article)
June 2016 – Extensions to 1D TDEM inversion capabilities 21 Jun 2016

We have added a large number of new functionalities to our 1D TEM inversion tools including simultaneous inversion of data from different base frequencies

(full article)
May 2016 - New Simulation Capabilities 11 May 2016

Inductive Plate Algorithm - FAST!

We have implemented a new compiler and other engineering aspects. The result is up to 50 times increased speed of computation!

(full article)
CGG Airborne Systems 9 Jan 2016

Support for CGG 100% normalized step response data has been implemented and is released in today's updates.

(full article)
Holiday prices 15 Dec 2015

Holiday pricing is now available for some licenses until Jan 1,2016. See the prices page for details.

Oct 2015 – EMIGMA V9.0 release 27 Oct 2015

We are pleased to announce a dramatically new version of the EMIGMA geophysics software. Changes include upgrades to computation speeds and accuracy and network dongle capability.

(full article)
May 2015 - EMIGMA developments 14 May 2015

Some exciting features added to EMIGMA include new imports, better geophysical data and error handling, as well as powerful modeling, inversion and mapping.

(full article)
July 2014 - New EMIGMA Developments 25 Jul 2014

With the introduction of new ground FEM systems, we have upgraded our tools for the newer systems particularly PROMIS, DualEM and GEM2.

(full article)
July 2014 - Expansion of MT Tools 24 Jul 2014

Last year, we completed major upgrades to our MT licenses but the growing popularity for these products is encouraging further additions.

(full article)
April 2014 - New IP/Resistivity Developments 22 Jul 2014

This year, we have released major upgrades to our Resistivity and IP licenses. We believe that EMIGMA is now the most comprehensive software package for such data.

(full article)
Sept 2013 News 17 Sep 2013

We have worked on our geophysics software to make the user interfaces more user-friendly. There has also been a strong focus on data import capabilities.

(full article)
June 2012 News 22 Jun 2012

Our geophysics software tools have undergone quite a few developments in the area of processing and visualization of magnetotelluric and CSAMT data.

(full article)
March 2012 News 9 Mar 2012

We are excited to present to you some of the many new features have been added to our geophysics products including enhancements to EMIGMA's 3D inversion

(full article)
3D CAD Import/Exports 31 Oct 2011

We have augmented our geophysics software tools for interacting with 3D CAD applications.

(full article)
QCTool Version 2.3 released 27 Sep 2011

This new version of our software has been recompiled and optimized for Windows Vista and Windows 7 among other new features.

(full article)
Sept 2011 News 1 Sep 2011

Our EMIGMA geophysics software has had many improvements over the last several months including enhancements to tem and mag inversion as well as 3d resistivity modeling.

(full article)
July 2011 - New MMR tools and license 6 Jul 2011

New simulation algorithms have been developed in our geophysics software for ground and borehole MMR surveys. The MMR license also includes borehole DC magnetic geophysical modeling.

(full article)
EMIGMA 8.6 is now available 24 Jun 2011

Licensed users with an up to date maintenance may download the latest release of our geophysics software here.

March 2011 News 4 Mar 2011

There have been some notable additions to EMIGMA during the fall of 2010 and early winter 2011.

(full article)
EMIGMA V8.5 has been released 29 Jul 2010

We are pleased to announce the immediate release of version 8.5 of EMIGMA. EMIGMA users with a license currently under maintenance are eligible for a free upgrade to this latest version.

(full article)
What's new in EMIGMA 28 Jan 2010

Many new features were included in EMIGMA during the fall of 2009

(full article)
New features in EMIGMA and QCTool 8 Jul 2009

Many new capabilities have been added to our products including the support of additional import formats as well as enhanced simulation algorithms.

(full article)
Time Domain Inversion 6 Jul 2009

While EMIGMA has contained one-dimensional inversion for TEM for a few years now, we have recently released two significantly enhanced versions.

(full article)
Updated Demo Databases 17 Apr 2009

The demo databases available in the downloads area of this website have received some substantial modifications.

(full article)
New TDEM Demo Database 25 Mar 2009

A new demo database exclusively containing time domain data for ground and borehole surveys is available.

(full article)
QCTool Price Increase 5 Mar 2009

As of April 1, 2009, the price for QCTool will be $200 CAD.

Download GeoTutor IV 20 Feb 2009

GeoTutor IV is now available for download from our website.

(full article)
Magnetic Compensation Plug-In 16 Jan 2009

We now offer a plug-in for Geosoft Oasis to perform magnetic compensation on aeromagnetic data contained within your .gdb files.

(full article)
EMIGMA video now available 2 Dec 2008

A training video demonstrating the power of EMIGMA can now be downloaded for free from the Downloads section of our website.

(full article)
New Modeling Capabilities 10 Nov 2008

We now offer forward modeling capabilities for MTEM and CSEM as well as for airborne MT applications such as ZTEM.

(full article)
New terraTEM import and functionality added 26 Jun 2008

EMIGMA now has the ability to import data generated by the terraTEM instrument.

(full article)
GeoTutor IV is now available 11 Jun 2008

We are proud to announce the immediate release of GeoTutor IV. This new version introduces the ability to register online using a customized serial number in the same way as Petros Eikon's QCTool.

(full article)
EMIGMA V8.1 is now available 28 Apr 2008

We are happy to announce the immediate release of EMIGMA V8.1, which brings with it complete compatibility with Windows Vista as well as a number of new capabilities and improvements.

(full article)
Buy Our Software Online 11 Feb 2008

Recently added to our Price page is the ability to securely purchase various PetRos EiKon products online using PayPal.

(full article)
EMIGMA V8.1 Coming Soon 4 Feb 2008

We are very pleased to announce the upcoming release of EMIGMA 8.1 on March 31. This will be the first EMIGMA product to be compatible with Windows Vista.

(full article)
Improved TEM Inversion 3 Jan 2008

While EMIGMA has contained one-dimensional inversion for TEM for a few years now, we have recently released a dramatically enhanced version.

(full article)
TEM-FAST added to EMIGMA 7 Dec 2007

Petros Eikon has enhanced one of its flagship products with TEM-FAST electromagnetic geophysical data capabilities.

(full article)
PetRos EiKon Services 21 Nov 2007

We have many geophysical services that can conform to your needs. Our experience extends to data in the areas of electromagnetics, magnetics and gravity.

(full article)
QCTool V2.2 Now Available 9 Nov 2007

Visit our downloads area to obtain QCTool so you can experience this latest version first hand.

(full article)
EMIGMA V7.8 - New Features 20 Aug 2007

Now in its third major release, EMIGMA V7.8 has an unequaled array of functions and now provides virtually all of your processing, modeling and inversion requirements for EM, Magnetics, Gravity, IP and Resistivity

(full article)
New release of QCTool (August, 2007) 20 Aug 2007

New release of QCTool 2.1(August, 2007).

(full article)
EMIGMA Update 1 Aug 2007

Users with an active maintenance contract can now download a new EMIGMA update for July 27.

Purchase QCTool via PayPal 23 Jun 2006

You can now purchase a QCTool license online via PayPal. You can use either a credit card or, if you live in USA or Canada, your bank account.

PetrosSuite Teaching & Research Software 31 May 2006

PetrosSuite - a new Teaching & Research software bundle for Academics.

(full article)
New Data Processing and Interpretation Services 31 May 2006

New Interpretaton and Processing Services now available.

(full article)
Aeromagnetic Compensaton now available in QCTool 31 May 2006

Aeromagnetic Compensation now available in QCTool (May, 2006)

(full article)
Two New Technical Papers 30 May 2006

Dr. Cheng studies the 3D airborne TEM modeling capabilities of EMIGMA and other available programs. In the second by Prof. Duckworth, he discusses among other things comparisons between EMIGMA's modeling results and his own scale model results.

(full article)
Live Chat and Support 8 May 2006

You can now talk to us live during our work hours (9:30am-7:30pm EST/EDT). Feel free to ask us any questions you may have, but please be patient. It may take a while for someone to answer.

To use the chat system, choose a nickname and click "Login". If the nickname you chose is not available, you can set a new one with "/nick newname" (without the quotes) or just reload the page and retry.

New release of EMIGMA V7.8 now available 30 May 2005

New release of EMIGMA V7.8 (December, 2005) now available

(full article)
May 2005 News 30 May 2005

Conductivity Depth Imaging now available in EMIGMA V7.8.

May 2005 News 30 May 2005

New Impulse to Step Processing now available in EMIGMA V7.8.

May 2005 News 30 May 2005

QCTool now available for Scintrex CG5.

May 2005 News 30 May 2005

Imports, Modelling, Inversion, CDI's available for VTEM and AeroTeM systems.

May 2002 News 1 May 2002

Introducing EMIGMA V7.5

(full article)
February 2001 News 1 Feb 2001

EMIGMA Version 7 Release

(full article)
July 2000 News 1 Jul 2000

EMIGMA V7.0 Ready for Beta Testing

(full article)
December 1998 News 1 Dec 1998

EMIGMA V6.2 at a Glance

(full article)
February 1998 News 1 Feb 1998

New EMIGMA V6.1 Release Now Available

(full article)
April 1997 News 1 Apr 1997

3D Data Representation and Multiple Plates Now Available

(full article)
September 1996 News 1 Sep 1996

Focus: Improved Induction

(full article)
February 1996 News 1 Feb 1996

Sneak Preview into EMIGMA Version 5

(full article)
August 1995 News 1 Aug 1995

3D Resistivity/IP Surveys With EMIGMA Version 4

(full article)
July 1995 News 1 Jul 1995

EMIGMA Version 3

(full article)
October 1994 News 1 Oct 1994

New EMIGMA Development

(full article)
August 1994 News 1 Aug 1994

VH Plate Development

(full article)
July 1994 News 1 Jul 1994

MITEC Project

(full article)