Correcting Recent Reporting on Offshore Flaring in Guyana

Recent reporting misrepresented SkyTruth data.

We’re always glad to have conservation-minded groups and individuals use our flaring maps, but we would like to correct some errors in how our data was interpreted in two recent articles in the Stabroek News concerning natural gas flaring from an ExxonMobil-owned vessel, the Liza Destiny, anchored off the coast of Guyana. 

In early June, 2020, the Guyana Marine Conservation Society (GMCS) contacted SkyTruth to see if we could help monitor natural-gas flaring from the Liza Destiny. The Liza Destiny had mechanical issues that required it to continuously flare, and GMCS wanted to be able to verify the flaring that ExxonMobil was reporting.

This isn’t a request that SkyTruth can normally help with, but the unique circumstances surrounding the Liza Destiny allowed us to provide GMCS with some meaningful data. Our global flaring map is a visualization of flaring events detected around the world, every day, using satellite data. The source of our data is the Earth Observation Group, which identifies flaring based on measurements of brightness and temperature captured by National Oceanic and Atmospheric Administration satellites. Due to the low level of detail of these images (each pixel represents a spot on the ground about 750 meters across), we usually can’t pinpoint flaring to a specific source such as an individual oil or gas well. However, since there were no other flaring vessels near the Liza Destiny, we could confidently assign all flaring events within the satellite’s accuracy to this vessel. 

In mid-July, GMCS asked for an update containing the most recent data, which we provided by way of this document. The ensuing article in Stabroek News on July 25, 2020, erroneously claimed that our data showed the Liza Destiny was flaring from June 27 through July 7, a period when ExxonMobil reported to the Guyana EPA that there was no flaring because the vessel was undergoing maintenance.

Contrary to what the article suggests, the data SkyTruth provided did not contradict ExxonMobil. Our data did not show flaring on these dates, with the exception of June 28. It’s important to note that the lack of flaring in our data for that time period doesn’t conclusively prove there was no flaring, because clouds can block the satellites’ ability to “see” flares. 

And none of this is to imply that there are not legitimate concerns about the persistent, long-term flaring at this vessel documented in the data we shared with GMCS. 

What’s a Mathematician Doing at SkyTruth?

Alice Foster discovered her love for geology at Brown University, and meandered onto SkyTruth’s path.

My name is Alice Foster, and I started as an intern at SkyTruth this past January. But my journey to SkyTruth was a bit unexpected. I am currently studying applied mathematics at Brown University. And until recently, I was somewhat unenthusiastic about science, although I was interested in conservation issues.

Then, in search of an introductory environmental studies class at my first academic fair, I ended up talking to a professor at the Department of Earth, Environmental, and Planetary Sciences table. She convinced me to try out her class, which she said offered a good foundation for understanding environmental issues. In the opening lecture, I was a bit disappointed to learn that the class was about geology; lacking any understanding of the subject beyond an earthquake project in seventh grade, I associated the word with something vaguely boring and irrelevant. But after a few minutes, I was hooked. I found it beautiful to understand how mountain ranges and canyons and plains come into being, and to try to wrap my head around the massive time scales on which geological processes take place. Learning about crystal deformation at a molecular level was fascinating because it could explain how an entire glacier moves. Everything seemed to fit together. Over the course of the semester we applied physics and chemistry, satellite and seismic imagery, and logic to solve Earth’s riddles. 

One of my favorite topics covered in that class was meandering rivers, a concept I identified with. A meander forms a curve in a river: fast-moving water wears away at the outer bank, while sediment transported by slower-moving water amasses at the inner edge, creating a point bar. This process of erosion and deposition makes the bends bendier and the river wander. 

If you look at outcrops on the side of a road, you might spot evidence of ancient meandering rivers. A fast-moving river can transport and deposit large pebbles in its channel. When the water changes course, the former channel becomes part of the river’s floodplain. At times, the river overwhelms its banks and leaves behind sand and clay to overlay the old layer. Some years later, the channel might shift again and deposit larger grains on top of the fine particles. In the rock record, these deposits can appear as beds of shale interspersed with conglomerates.

Alice camping with friends. Photo by Ailita Eddy.

The summer after I took this geology class, I encountered a magnificent meandering river near a farm I worked at in Iowa. Tall trees with lush foliage grew on one bank; a cow pasture bordered the other. I liked to walk down the road to a bridge overlooking the river. I imagined it all playing out: water flowing around the outer edge and loosening soil from the steep bank, bits of rock bouncing chaotically along the riverbed, and the inner bank growing thick with silt. In millions of years, the vestiges of the river might lie deep beneath the ground, compacted, cemented, and turned to stone. 

Since then, my interest in geology and climate science, combined with my love for mathematics, has informed my meandering career exploration. This semester, I decided to take a break from school and homework and experience new things. I wanted to intern at SkyTruth because SkyTruth’s work combines many of my greatest passions, and because I felt excited about contributing to work that could benefit others. It is amazing to see up close how SkyTruth uses geospatial technology to solve tangible problems. I get to think about math and geology while engaging with immediate conservation issues around the world. 

Right now I am working on monitoring bilge dumping in oceans around the Arabian Peninsula, Africa, and Brazil. I am also working with SkyTruth staff to digitize natural gas well pads for a machine learning model. This model will allow SkyTruth to automatically identify well pads in Alaska and Patagonia.

As an intern I have had the chance to learn how to create maps in QGIS and how to program in Google Earth Engine. QGIS is a geographic information system application that can be used to analyze and visualize geospatial data such as satellite imagery or a ship’s track across the ocean. I have also gotten to reflect on what I might want my career to look like. I love getting to be part of a welcoming, supportive, super knowledgeable, all-around wonderful group of people pursuing new projects and ideas. Though I am unsure of my path, this is the kind of environment I will look for as I embark on my career.

Alice made this on a letterpress printer using a linoleum carving block and metal type. “Wild Geese” is one of her favorite poems. She wanted to create an image having to do with the refuge one can find in the natural world. Credit: Alice Foster

New Intern Matthew Ibarra Shifts from Aerospace Engineering to Protecting the Planet from Space

Matthew thought he wanted to be an aerospace engineer when he started college. Then he learned more about environmental damage to the planet.

Hello There!

My name is Matthew Ibarra and I am a new intern at SkyTruth. I am currently a student attending West Virginia University (WVU). Originally I came to WVU to study mechanical and aerospace engineering. I have always been passionate about math and science and so naturally I believed engineering would be a perfect fit for me. I was a part of my robotics team in high school and I believed this would be something I could do forever. 

However, as my time at WVU went on I became much less interested in engineering and I decided that I wanted to study something else. Through my engineering classes I inadvertently learned more about energy and from there about renewable energy sources. I developed a passion for renewables and I decided I wanted to shift my focus of study and work on environmental challenges. I have always felt there is a lot more bad news than good news in the world and I kept hearing about problems such as massive deforestation in the Amazon, pollution of the planet and the oceans — and those were just the tip of the melting iceberg. I wanted to do something that would leave a lasting impact. All of these factors pushed me to change my major to Environmental and Energy Resource Management. And it was the best decision I have ever made. 

Matthew played saxaphone for the WVU marching band and currently plays clarinet in the WVU Concert Band and saxophone in the WVU pep band. Photo by Roger Sealey.

My best friend Amanda’s mother Teri works at SkyTruth as our office administrator, which was very serendipitous for me. Amanda told me about SkyTruth and I was excited to learn how SkyTruth gathers environmental data and conducts research using satellite imagery. I was intrigued because it seemed like SkyTruth worked in all the areas I was passionate about: the environment, technology, and research. I looked into some of SkyTruth’s current and past projects and the ones that excited me the most include FrackFinder, which helps keep track of the environmental impacts of fracking for natural gas. I was also excited about SkyTruth’s interactive maps that help track the removal of mountaintops from coal mining. SkyTruth works on many other projects that I knew that I wanted to be a part of as well. An internship at SkyTruth was the perfect way for me to not only help work on projects I cared about, but also to learn more about what I am interested in.

As an intern I am currently working to monitor the South East Asia region for bilge dumps. Bilge dumps are illegal practices by vessels that attempt to bypass pollution control and dump their oily ballast and waste water at sea. I am collecting useful data that will contribute to a machine learning program that can automatically detect bilge dumps from satellite images around the world. I am also working to update FrackFinder to include data from 2016 and create an interactive map that can easily display information such as natural gas well pad locations in West Virginia, and when they were drilled, to show how natural gas fracking has impacted West Virginia over time.

I am passionate about sustainability and hope to make this central to my career. Sustainability is the notion of living your life in such a way that you leave resources for the people who come after you. After my time here at SkyTruth I hope to go into government work. I would like to work for the Department of Energy in the Office of Energy Efficiency and Renewable Energy. Fossil fuels will eventually run out and a transition to renewables will help current climate and environmental issues. I feel that it is important to find solutions now and transition our power needs to something that is more sustainable while we are still able to do so. 

Matthew admires Blackwater Canyon in West Virginia. Photo by Matthew Ibarra.

I believe SkyTruth is important in achieving my goals because I am gaining valuable skills and knowledge that I know will help me in the future. I love working with Geographic Information System programs (GIS). GIS is essentially using computers to analyze physical features of the Earth such as measuring forest density or tracking changing temperatures; it has almost endless applications.  I am learning to work with Google Earth Engine which is essentially a super powerful and intuitive way to work in GIS. Earth Engine requires me to be able to code in the programming language JavaScript and so I’m learning that skill as well. These are skills that will be forever relevant in the future and I am excited to deepen my understanding of them.

When I started college five years ago I never thought that I would end up where I am today. I spent so many sleepless nights trying to finish my physics homework and study my chemistry notes. I never thought that I would want to give all that up to work in something completely different, but I am thankful I did. I am eager to be learning something new every day at SkyTruth and I am thankful to everyone who helped me get to where I am today. I am excited to continue my internship here and keep learning more about what’s important to me.

Matthew is a hockey fan and celebrated the DC Capitals’ Stanley Cup victory in 2018. Photo by Photos Beyond DC.



SkyTruth 2020: What to Expect in the New Year

Oil pollution at sea, mountaintop mining, Conservation Vision and more on SkyTruth’s agenda.

SkyTruth followers know that we generated a lot of momentum in 2019, laying the groundwork for major impact in 2020. Here’s a quick list of some of our most important projects underway for the new year.

Stopping oil pollution at sea: SkyTruth has tracked oil pollution at sea for years, alerting the world to the true size of the BP oil spill, tracking the ongoing leak at the Taylor Energy site until the Coast Guard agreed to take action, and flagging bilge dumping in the oceans. Bilge dumping occurs when cargo vessels and tankers illegally dump oily wastewater stored in the bottom of ships into the ocean. International law specifies how this bilge water should be treated to protect ocean ecosystems. But SkyTruth has discovered that many ships bypass costly pollution prevention equipment by simply flushing the bilge water directly into the sea.

In 2019 SkyTruth pioneered the identification of bilge dumping and the vessels responsible for this pollution by correlating satellite imagery of oily slicks with Automatic Identification System (AIS) broadcasts from ships. For the first time, we can ID the perps of this devastating and illegal practice.


Figure 1. SkyTruth identified the vessel PERKASA dumping bilge water via AIS broadcast track overlain on Sentinel-1 image. 

But the Earth’s oceans are vast, and there’s only so much imagery SkyTruthers can analyze. So we’ve begun automating the detection of bilge dumping using an Artificial Intelligence (AI) technique called machine learning. With AI, SkyTruth can analyze thousands of satellite images of the world’s oceans every day –- a process we call Conservation Vision — finding tiny specks on the oceans trailing distinctive oily slicks, and then naming names, so that the authorities and the public can catch and shame those skirting pollution laws when they think no one is looking.

A heads up to polluters: SkyTruth is looking. 

We got a big boost last month when Amazon Web Services (AWS) invited SkyTruth to be one of four nonprofits featured in its AWS re:Invent Hackathon for Good, and awarded SkyTruth one of seven AWS Imagine Grants. We’ll be using the funds and expertise AWS is providing to expand our reach throughout the globe and ensure polluters have nowhere to hide.

Protecting wildlife from the bad guys: Many scientists believe the Earth currently is facing an extinction crisis, with wildlife and their habitats disappearing at unprecedented rates.   

But SkyTruth’s Conservation Vision program using satellite imagery and machine learning can help. Beginning in 2020, SkyTruth is partnering with Wildlife Conservation Society to train computers to analyze vast quantities of image data to alert rangers and wildlife managers to threats on the ground. These threats include roads being built in protected areas, logging encroaching on important habitats, mining operations growing beyond permit boundaries, and temporary shelters hiding poachers. With better information, protected area managers can direct overstretched field patrols to specific areas and catch violators in the act, rather than arriving months after the fact.  It can alert rangers before they discover a poaching camp by chance (and possibly find themselves surprised and outgunned).

To make this revolution in protected area management possible we will be building a network of technology and data partners, academic researchers, and other tech-savvy conservationists to make the algorithms, computer code, and analytical results publicly available for others to use. By publicly sharing these tools, Conservation Vision will enable others around the world to apply the same cutting-edge technologies to protecting their own areas of concern, launching a new era of wildlife and ecosystem protection. In 2020 we expect to undertake two pilot projects in different locations to develop, refine, and test Conservation Vision and ultimately transform wildlife protection around the world.

Identifying mountaintop mining companies that take the money and run. SkyTruth’s Central Appalachia Surface Mining database has been used by researchers and advocates for years to document the disastrous environmental and health impacts of mountaintop mining. Now, SkyTruth is examining how well these devastated landscapes are recovering.

Figure 2. Mountaintop mine near Wise, Virginia. Copyright Alan Gignoux; Courtesy Appalachian Voices; 2014-2.

To do this, we are generating a spectral fingerprint using satellite imagery for each identified mining area. This fingerprint will outline the characteristics of each site, including the amount of bare ground present and information about vegetation regrowth. In this way we will track changes and measure recovery by comparing the sites over time to a healthy Appalachian forest. 

Under federal law, mining companies are required to set aside money in bonds to make sure that funds are available to recover their sites for other uses once mining ends. But the rules are vague and vary by state. If state inspectors determine that mine sites are recovered adequately, then mining companies reclaim their bonds, even if the landscape they leave behind looks nothing like the native forest they destroyed. In some cases, old mines are safety and health hazards as well as useless eyesores, leaving communities and taxpayers to foot the bill for recovery. SkyTruth’s analysis will provide the public, and state inspectors, an objective tool for determining when sites have truly recovered and bonds should be released, or when more should be done to restore local landscapes.

Characterizing toxic algal blooms from space: Harmful algal blooms affect every coastal and Great Lakes state in the United States. Normally, algae are harmless — simple plants that form the base of aquatic food webs. But under the right conditions, algae can grow out of control causing toxic blooms that can kill wildlife and cause illness in people. 

 SkyTruth is partnering with researchers at Kent State University who have developed a sophisticated technique for detecting cyanobacteria and other harmful algae in the western basin of Lake Erie — a known hotspot of harmful algal blooms. They hope to extend this work to Lake Okeechobee in Florida. But their method has limitations: It uses infrequently collected, moderate resolution 4-band multispectral satellite imagery to identify harmful blooms and the factors that facilitate their formation. SkyTruth is working to implement the Kent State approach in the more accessible Google Earth Engine cloud platform, making it much easier to generate updates to the analysis, and offering the possibility of automating the update on a regular basis.  We anticipate that this tool eventually will enable scientists and coastal managers to quickly identify which algal blooms are toxic, and which are not, simply by analyzing their characteristics on imagery.

Revealing the extent of fossil fuel drilling on public lands in the Colorado River Basin: Modern oil and gas drilling and fracking is a threat to public health, biodiversity and the climate. For example, researchers from Johns Hopkins University used our data on oil and gas infrastructure in Pennsylvania to examine the health effects on people living near these sites and found higher premature birth rates for mothers in Pennsylvania that live near fracking sites as well as increased asthma attacks.

The Trump Administration is ramping up drilling on America’s public lands, threatening iconic places such as Chaco Culture National Historical Park in New Mexico. Chaco Canyon is  a UNESCO World Heritage Site that contains the ruins of a 1,200 year-old city that is sacred to native people. According to the Center for Western Priorities, 91% of the public lands in Northwest New Mexico surrounding the Greater Chaco region are developed for oil and gas, and local communities complain of pollution, health impacts and more.

Figure 3. Chaco Canyon Chetro Ketl great kiva plaza. Photo courtesy of the National Park Service.

In 2020 SkyTruth will deploy a machine learning model we developed in 2019 that identifies oil and gas drilling sites in the Rocky Mountain West with 86.3% accuracy. We will apply it to the Greater Chaco Canyon region to detect all oil and gas drilling sites on high-resolution aerial survey photography. We hope to then use these results to refine and expand the model to the wider Colorado River Basin. 

Local activists in northwestern New Mexico have fought additional drilling for the past decade. Last year, New Mexico’s congressional delegation successfully led an effort to place a one-year moratorium on drilling within a 10-mile buffer around the park. Activists view this as a first step towards permanent protection. SkyTruth’s maps will help provide them with visual tools to fight for permanent protection.

A new SkyTruth website: We’ll keep you up to date about these projects and more on a new, revamped SkyTruth website under development for release later this year. Stay tuned for a new look and more great SkyTruthing in the year ahead!

New Oil and Gas Flaring Data Available

Updated data means anyone can see where, and how much, natural gas is being flared in their area.

SkyTruth has updated its Annual Flare Volume map to include 2017 and 2018 data. We first launched the map in 2017 to provide site specific estimates of the annual volume of gas flared during oil and gas production worldwide.

What is flaring?

Flaring is the act of burning off excess natural gas from oil wells when it can’t economically be stored and sent elsewhere. Flaring is also used to burn gases that would otherwise present a safety problem. But flaring from oil wells is a significant source of greenhouse gases. The World Bank estimated that 145 billion cubic meters of natural gas were flared in 2018; the equivalent of the entire gas consumption of Central and South America combined. Gas flaring also can negatively affect wildlife, public health, and even agriculture.

What can I do?

SkyTruth’s map allows users to search the data by virtually any geographic area they’re interested in, then easily compare and download flare volume totals from 2012 through 2018 to observe trends. In addition, it separates flaring into upstream (flaring of natural gas that emerges when crude oil is brought to the Earth’s surface), downstream oil (refineries) and downstream gas (natural gas processing facilities). Residents, researchers, journalists and others concerned about gas emissions in their city or study area can easily determine the sources of the problem using the latest data available, and how much gas has been flared.

VIIRS Satellite Instrument and the Earth Observation Group

The data we use in the SkyTruth map is a product of the Visible Infrared Imaging Radiometer Suite (VIIRS) satellite instrument, which produces the most comprehensive listing of gas flares worldwide. VIIRS data has moved to a new home this year at the Earth Observation Group in the Colorado School of Mines’ Payne Institute for Public Policy. SkyTruth also uses the VIIRS nightfire data in its popular flaring visualization map.

Thanks to the Earth Observation Group for continuing to make the nightfire data freely available to the public! They have authored the following papers for those interested in the VIIRS instrument and how the flare volume is calculated.

Elvidge, C. D., Zhizhin, M., Hsu, F -C., & Baugh, K. (2013).VIIRS nightfire: Satellite pyrometry at night. Remote Sensing 5(9), 4423-4449.

Elvidge, C. D., Zhizhin, M., Baugh, K. E, Hsu, F -C., & Ghosh, T. (2015). Methods for global survey of natural gas flaring from Visible Infrared Imaging Radiometer Suite Data. Energies, 9(1), 1-15.

Elvidge, C. D., Bazilian, M. D., Zhizhin, M., Ghosh, T., Baugh, K., & Hsu, F. C. (2018). The potential role of natural gas flaring in meeting greenhouse gas mitigation targets. Energy Strategy Reviews, 20, 156-162.