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Erwan Rivault

@erwanrivault.com
6.4K followers 665 following 80 posts

Data visualisation designer at BBC News focusing on satellite data, climate change and cartography | previously at @esa.int | Co-founder of @chartle.cc - A daily chart game

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Erwan Rivault @erwanrivault.com · 10/09/2026
New data released today by Copernicus shows western Europe has just experienced its hottest summer on record, averaging 2.5°C above normal, with parts of France recording summer temperatures up to 4.5°C above average. www.bbc.co.uk/news/article...
Map of summer temperature anomalies across Europe, with parts of France more than 4°C above average. A chart below compares western Europe's summer temperatures since 1979, showing that 2026 was the hottest summer on record, exceeding the previous 2003 record by more than 0.5°C.
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Erwan Rivault @erwanrivault.com · 04/07/2026
Last week's heatwave broke more than 170 June temperature records across the UK, mostly in England and Wales, with some weather stations recording maximum temperatures up to 6C above previous records. Our analysis of the UK and Europe heatwave in 7 maps and charts: www.bbc.co.uk/news/article...
Map of the UK showing weather stations where June temperature records were broken. The stations are marked by triangles; the taller the peak, the bigger the gap between the old record and the new one. More than 170 weather stations broke their previous temperature record, mainly across England and Wales. A few local records were also broken in Scotland and Northern Ireland. The biggest record-breaking margin was Lingwood in Norfolk, which broke its previous June record by 6 degrees Celsius.
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Peter Andringa @peter.andringa.me · 15/04/2026
New FT investigation: Leaked satellite tasking records show Iran used a high-resolution Chinese satellite to surveil US bases last month. as.ft.com/r/ac8726e8-f...
as.ft.com
Iran used Chinese spy satellite to target US bases
Leaked documents show IRGC secretly acquired system and used it to guide strikes during war in March
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Erwan Rivault @erwanrivault.com · 25/03/2026
nytimes.com
How Blocking Oil and Gas From Leaving the Strait of Hormuz Ripples Around the World
Trade is trickling through the vital artery connecting the Persian Gulf and the world, creating an economic shock thousands of miles away.
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Erwan Rivault @erwanrivault.com · 25/03/2026
I love a Sankey diagram that doubles as a map, and today's New York Times example (tracking oil and gas flows through the Strait of Hormuz) is especially brilliant! Reminds a lot of Minard’s famous visualisation of Napoleon’s 1812 Russian campaign of course. (I’ve rotated the NYT one horizontally)
New York Times Sankey diagram of oil and gas flow through the Strait of Hormuz, rotated horizontallyCharles Joseph Minard’s famous Sankey visualisation of Napoleon’s 1812 Russian campaign
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Erwan Rivault @erwanrivault.com · 19/03/2026
Massive 20km long oil spill visible in yesterday's Sentinel-2 satellite image following US strike on Iranian drone carrier Shahid Bagheri near Bandar Abbas.
Satellite image shows 20km long oil spill next to Strait of Hormuz, and a zoom on the Iranian drone carrier that was hit by US strike on 6 March.
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Erwan Rivault @erwanrivault.com · 07/03/2026
We followed its journey using satellite imagery in this visuals-led piece. Your weekend read here with words by @markpoynting.bsky.social and graphics by me
bbc.com
This iceberg was once the biggest in the world. Now it has just weeks left - BBC News
A23a was once twice the size of Greater London but now its 40-year journey is coming to an end.
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Erwan Rivault @erwanrivault.com · 07/03/2026
We’ve tracked A23a iceberg for a while now, but this is our last story about it! Once the world’s biggest (2x the size of Greater London), it drifted north up to 47ºN where warmer waters and seas broke it into smaller bergs, ending up as the world’s largest pool as melt ponds formed on its surface.
gallery of 9 satellite images from 3 January 2025 to 1 March 2026 showing A23a iceberg becoming smaller and smaller as smaller icebergs break away, and melt ponds appear on the surface.
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Jana Tauschinski @janatausch.bsky.social · 14/02/2026
A special FT magazine issue all about maps is out today, w great pieces by @okr.bsky.social and @theboysmithy.ft.com, plus maps by me on how glacial melt is redrawing Alpine borders, the battle to redraw America and more Read it online here (though best enjoyed in print!) www.ft.com/content/efab...
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PeterMF @petermoorefuller.bsky.social · 05/02/2026
This is fantastic. Engaging people with data through game play. Also has that very Gapminder-ish quality of challenging assumption. Love it!
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Erwan Rivault @erwanrivault.com · 05/02/2026
Woop! Finistère gave it away with just one!
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Erwan Rivault @erwanrivault.com · 05/02/2026
Combien de bises? How many kisses for a greeting?
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Dr Anna Lombardi @annalombardi.bsky.social · 28/01/2026
It's official 🎉 Visualising Climate 2026 is here! visualisingclimate.com First international conference of its kind, it'll bring together artists, scientists, journalists all moved by the same desire to better communicate our changing climate 🌍 🗓️ Join us in Bologna, Nov 4-6 #dataviz #climatecrisis
visualisingclimate.com
Visualising Climate 2026 — Conference
The first global conference dedicated to how data visualisation can transform public understanding of climate change and support informed decision-making.
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Erwan Rivault @erwanrivault.com · 18/01/2026
I’m sure you’d enjoy chartle.cc as well!
chartle.cc
Chartle - A daily chart game
Guess the country in red by analysing today's chart
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Erwan Rivault @erwanrivault.com · 16/01/2026
Thank you Georgina! 🙏
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Erwan Rivault @erwanrivault.com · 16/01/2026
Scientists have just unveiled the most detailed data yet of the terrain hidden under Antarctica’s ice. We mapped it and compared it to the previously best available data for our story with @markpoynting.bsky.social www.bbc.co.uk/news/article...
Map of Antarctica's elevation beneath the ice. Blue areas indicate land below sea level, and brown areas indicate land above sea level. Large regions, especially in West Antarctica, lie below sea level. The new map reveals with more detail what landscape hides beneath the ice, with some corresponding photographs of similar landscapes in other parts of the world today, such as Alpine mountains, plateaus dissected by deep glacier-carved valleys, and flat plains.Side-by-side maps comparing an older and a newer map of a zoomed area in East Antarctica’s elevation beneath the ice. Both maps use blue to show areas below sea level and brown to show areas above sea level. The newer map shows much finer detail, clearly revealing features such as the Golicyna Subglacial Highlands that are more difficult to distinguish on the older map.
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Copernicus ECMWF @copernicusecmwf.bsky.social · 14/01/2026
The global warming trend continued in 2025. Each of the past 11 years (2015–2025) has been among the 11 warmest on record. Explore more data from #CopernicusClimate in the Global Climate Highlights 2025. #GCH2025 🔗 climate.copernicus.eu/global-clima... @ecmwf.int
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chartle @chartle.cc · 09/01/2026
Which country consumes the most beer per person? Think you can guess it in 5 tries or less? Have a try at chartle.cc
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Erwan Rivault @erwanrivault.com · 05/01/2026
New exciting update to chartle.cc 📈 You can now use the *Explore data* mode after finishing a game to find out what all the other grey lines represent. This has been requested by many of you, thanks for all the feedback! Let us know what you think!
chartle.cc
Chartle - A daily chart game
Guess the country in red by analysing today's chart
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Becky Dale @beckydale.bsky.social · 02/01/2026
New record year for renewable electricity in Britain - thanks especially to strong solar output. Read our analysis of 2025 here www.bbc.co.uk/news/article...
Two part graphic showing the daily contribution of solar in Great Britain’s electricity. The top half is a single tile chart arranged in 30-minute blocks from midnight on left to 23:59 on right with each row representing one day and ordered top-to-bottom from 1 January to 31 December 2025. Blocks are shaded by strength of generation share. In 2025, more than a dozen blocks are dark orange to show share above 40 percent. Contribution in summer days is longer and generally stronger than in winter. The second part of the graphic repeats the format as a small multiple with one fart for each year from 2013 to 2024. Each year increases in strength over that period but 2025 is the greatest contributor overall.
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chartle @chartle.cc · 17/12/2025
Which country holds the world’s largest proven crude oil reserves? Think you can guess it? Have a try at chartle.cc
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Alexandre Médina @a-lex-map.bsky.social · 30/11/2025
#30daymapchallenge · Jour 30 · Relooking 🌍 Europe · Europa · Ευρώπη · Європа 🔍 Zoomez pour découvrir les villes d'Europe dans leur langue. 🔽 L'ancienne carte, en commentaire, utilisait un texte de substitution, réalisée pour le #30daymapchallenge 2024. #cartographie #map #europe #europa
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Evan Peck @peck.phd · 22/11/2025
This has been such a lovely way to start class in my vis course over the past few weeks.
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chartle @chartle.cc · 20/11/2025
Can you guess the country in red just by analysing the chart? Have a try at chartle.cc
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chartle @chartle.cc · 27/10/2025
Can you guess which country suddenly stopped all its nuclear power generation in the early 2010s, and then slowly restarted it? Have a try at chartle.cc
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Erwan Rivault @erwanrivault.com · 23/10/2025
The Israeli military is placing large yellow blocks to delineate the newly established Yellow Line in Gaza - issue is, it’s off by over 500 meters in some areas, shrinking the Palestinian safe area. www.bbc.co.uk/news/article...
Satellite image of north west Gaza shows position of Yellow line and 6 yellow blocks about 500m to the south, showing misalignment.
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Erwan Rivault @erwanrivault.com · 20/10/2025
DMs open or email me at hello@erwanrivault.com
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Erwan Rivault @erwanrivault.com · 20/10/2025
Do you enjoy playing chartle.cc? We’re opening up to the community! Are you a scientist, journalist, researcher or just a data-enthusiast and would like to submit your own data (it should be a country-based time series)? Get in touch with us - we’d love to feature it!
chartle.cc
Chartle - A daily chart game
Guess the country in red by analysing today's chart
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Ana Lucía González @anlugonz.bsky.social · 16/10/2025
New visual story: Bird migration is one of nature’s greatest spectacles — and scientists are uncovering extraordinary insights into how new threats are reshaping these epic journeys. Follow the remarkable travels of three birds as they fly across the planet. www.theguardian.com/environment/...
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chartle @chartle.cc · 14/10/2025
Can you guess which country went from producing almost 70% of its electricity from coal in the 1980s to just 0.82% in 2024? Think you know? Try it at chartle.cc
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Jake Godin @godin.bsky.social · 13/10/2025
October 11 SkySat imagery from @planet.com shows a column of smoke rising from the Sheikh Ejleen Waste Water Treatment Plant after the IDF withdrew from the base they established at the plant. SkySat imagery from October 7 shows IDF vehicles and temporary structures set up inside the plant.
A SkySat satellite image from Planet Labs showing the Gaza Central Waste Water Treatment Plant Sheikh Ejleen south of Gaza City on October 7 2025. There is a large amount of destruction around the plant and near the plant grounds as well as in the plant itself there are IDF vehicles and temporary structures.A SkySat satellite image from Planet Labs showing the Gaza Central Waste Water Treatment Plant Sheikh Ejleen south of Gaza City on October 7 2025. There is a large amount of destruction around the plant and a column of smoke is rising from the plant grounds. The IDF vehicles and temporary structures are gone.
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Nassos Stylianou @nassosstylianou.bsky.social · 13/10/2025
NEW: How mega batteries are unlocking an energy revolution Massive shipping containers packed with powerful batteries are shoring up grids & extending the use of clean power ig.ft.com/mega-batteri... Latest visual story w/ @samlearner.bsky.social @inari-ta.bsky.social @samjoiner.bsky.social
ig.ft.com
How mega batteries are unlocking an energy revolution
Vast battery units are shoring up grids and extending the use of clean power
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Erwan Rivault @erwanrivault.com · 08/10/2025
Daily Chartle player? We’ve got an update for you 👀 You can now see how everyone else scored when you finish the game (this is today's game). Keep the feedback coming, it’s helping us make chartle.cc better!
Bar chart showing how many guesses players used to find the correct answer on chartle.cc
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chartle @chartle.cc · 30/09/2025
Can you guess which country has the most hospital beds per capita in the world? Have a try by playing at chartle.cc
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Erwan Rivault @erwanrivault.com · 29/09/2025
What about chartle.cc a daily chart game we just launched 3 weeks ago!
chartle.cc
Chartle - A daily chart game
Guess the country in red by analysing today's chart
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Erwan Rivault @erwanrivault.com · 24/09/2025
Another game to add to your morning routine! chartle.cc
chartle.cc
Chartle - A daily chart game
Guess the country in red by analysing today's chart
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Erwan Rivault @erwanrivault.com · 23/09/2025
Thanks Patrick!
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Erwan Rivault @erwanrivault.com · 23/09/2025
Starting a 3-month pilot today with the BBC’s brand-new satellite data team! We'll be focusing on using remote sensing data for news stories and longer-term investigations 🛰️ 🌍 Got tips, an upcoming paper or data, or just ideas you'd like to share with us? DM or email me at erwan.rivault@bbc.co.uk
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Erwan Rivault @erwanrivault.com · 20/09/2025
Thanks Mohammed! And thanks for the feedback, will work on it!
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Erwan Rivault @erwanrivault.com · 19/09/2025
I think you'd probably like chartle.cc as well!
chartle.cc
Chartle - A daily chart game
Guess the country in red by analysing today's chart
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Erwan Rivault @erwanrivault.com · 19/09/2025
Yes, you can! Open the expandable menu in the top-right corner, select "History", and choose any previous day to play - just be sure to remember the day for that dataset 🙂
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Erwan Rivault @erwanrivault.com · 19/09/2025
Thanks Miska 🙏
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Erwan Rivault @erwanrivault.com · 19/09/2025
It's been a week since we launched @chartle.cc with @adnaanj.bsky.social and we had an amazing start! - Average of 700 users/day - Record 1.2K users yesterday - From 78 countries - 66% win overall - 2m 18s average engagement Thank you to all who played + shared the game Any feedback, send our way!
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Erwan Rivault @erwanrivault.com · 17/09/2025
Thank you 🙏
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Erwan Rivault @erwanrivault.com · 16/09/2025
A chart-themed game in your datavis dispatch this week! @chartle.cc 📈
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Erwan Rivault @erwanrivault.com · 16/09/2025
Today's chartle game is almost exactly like 📈
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Erwan Rivault @erwanrivault.com · 16/09/2025
That's on our to do list! Thanks for the feedback 🙏
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Our World in Data @ourworldindata.org · 15/09/2025
A fun chart game that primarily sources its data from Our World in Data!
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Erwan Rivault @erwanrivault.com · 15/09/2025
For now, we’re using the hundreds of datasets compiled by @ourworldindata.org They source data from the World Bank, FAO, UN, WHO, and more, all consistently formatted, which makes it easy for us to connect to their API and use the data with just a few filters.
ourworldindata.org
Our World in Data
Research and data to make progress against the world’s largest problems
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Erwan Rivault @erwanrivault.com · 15/09/2025
Once you have played (win or lose), you can share your results with friends or post it on social media. A personalised chart will show your guess history without revealing the countries, so it won’t give your friends any hints!
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