21 Jul

Written By Hoplon

C H A P T E R

N ° 52

Historical Space Weather Events and The Banking Sector

Space weather poses significant systemic risks to the financial sector through infrastructure disruption and behavioral impacts on trading. Extreme events can trigger global economic losses, with Lloyds of London estimating scenarios of up to $2.4 trillion in loss.

The banking sector (sub-sector) is the foundational service industry that manages money, credit, and financial transactions for individuals, businesses, and governments within the financial sector. Its core function is to take deposits and channel these funds into loans and investments, fueling economic growth and market stability.

Historically, extreme space weather events have crippled global networks, costing economies billions and altering market behaviors. In today’s article, we will, therefore, look closer at historical space weather events and their impact on the financial sector. Moreover, we will explore the Quebec blackout from 1989, the Halloween storm from 2003, the Carrington Event from 1859, and the extreme solar storms of August 1972.

The Quebec Blackout (1989)

On March 13, 1989, a massive Coronal Mass Ejection (CME) (i.e., a large expulsion of plasma and magnetic field) from the Sun struck Earth and its magnetic field, triggering a severe geomagnetic storm. The geomagnetic storm induced violent Geomagnetically Induced Currents (GICs) (i.e., electrical currents) into the ground and the Hydro-Quebec power grid in Canada, causing a total blackout in just 92 seconds. The power grid collapse left 6 million people without power for 9 hours. For the financial markets in the regions, this meant a complete shutdown. Trading floors, banking servers (e.g., clearing systems), and digital transaction networks were temporarily paralyzed and forced offline until emergency power was restored.

The Halloween Solar Storms (2003)

The 2003 Halloween Solar Storms were a massive series of solar flares and Coronal Mass Ejection (CME) that occurred from mid-October to early November 2003. The event severely impacted global technology, causing power blackouts in Sweden, disrupting satellite communications and the Global Positioning System (GPS) Wide Area Augmentation System, and forcing commercial airlines to reroute flights to avoid radiation Because modern financial technology relies on satellites and Global Navigation Satellite Systems (GNSS) for time-stamping trades to the millisecond, this storm disrupted high-frequency stock trading platforms and online banking validation. The 2003 GPS signal degradation proved how vulnerable financial networks are to lost or slowed timing data.

The Carrington Event (1859)

On September 1st, 1859, British astronomer Richard Carrington observed an intense flash of white light originating from a massive sunspot group. This was the first-ever recorded solar flare. It launched a highly magnetized cloud of plasma – later to be known as a Coronal Mass Ejection (CME) hurtling toward Earth at speeds up to 2 million miles per hour, reaching Earth in just 17.5 hours.

The Carrington Event (1859) was the most intens solar storm in recorded history. It created geomagnetic storms that induced extreme electrical currents in telegraph wires, overloading global telegraph networks. Operators could run their devices entirely without batteries because of the powerful currents induced by the geomagnetic storm. Some operators even received electric shocks, and some telegraph stations caught fire. While modern global financial networks did not exist, telegraphs were the primary technology for transferring financial data and stock prices across oceans. The telegraphs were, thus, the "internet" of the day, and the loss of these in addition to the loss of communication severed real-time global commodity and currency pricing. A Carrington-level event today would likely trigger widespread satellite failures and extended blackouts, resulting in over $2.4 trillion in global economic losses according to estimations made by Lloyds of London.

The August 1972 Space Weather Event

Research shows that solar storms do not just affect computers. They also affect human decision-making. Studies like those on the US Stock Market found a correlation between periods of high geomagnetic activity and decreased capital market returns. This is because space weather can disrupt human sleep patterns, increase stress, and negatively affect investor mood, resulting in more cautious or pessimistic trading behavior and lower overall market performance.

While most research focuses on long-term statistical trends, the ‘August 1972 solar storms’ provide a striking historical example where severe space weather directly caused chaotic human behavior and market disruptions. During this event, the psychological stress of the unexpected technological chaos, combined with the literal biological impacts of the storm, triggered erratic human reactions across global financial and commodity markets.

In early August 1972, an ultra-fast Coronal Mass Ejection (CME) reached Earth in a record of 14.6 hours, triggering a series of severe geomagnetic and solar particle storms. The storm was so intense that it caused widespread power grid failures in North America, completely knocked out long-distance telecommunications capabilities, and accidentally detonated dozens of U.S. Navy sea mines in the waters off Vietnam. Because this occurred during the height of the Cold War, the sudden, total loss of communication and mysterious explosions sparked immediate widespread panic, with many initially fearing that a nuclear war had begun.

The combination of geopolitical terror and systemic communication blackouts immediately bled into the financial markets, driving sudden, emotionally charged behavior:

Triggering Safe-Haven Panics: The sudden communications blackout and fears of military conflict caused a massive, immediate psychological shock. Traders who were unable to get updates or contact overseas markets began panic-selling equities and rushing into safe-haven assets.
Scrambling Commodity Trading: At the time, commodity trading relied heavily on telegraphs, teletype machines, and long-distance phone lines. When the geomagnetic storm induced massive currents (i.e., Geomagnetically Induced Currents (GICs)) that fried these lines, trading floors were thrown into total confusion. Unable to price goods, traders made highly irrational, emotionally driven bids, causing short-term spikes in volatility.

What makes the August 1972 event a definitive example of a behavioral effect is that the panic was likely amplified by the space weather event’ direct impact on human biology. Medical studies analyzing data from 1972 noted a sharp, anomalous spike in hospital admissions for cardiovascular issues and psychiatric disturbances during that exact week. The extreme fluctuations in the Earth's geomagnetic field directly disrupted human nervous systems and circadian rhythms, artificially elevating collective anxiety and compounding the trading panic on the market floors.

Source

Kam, Warren et al. (2025): “Solar Influences on Financial Markets: Toward Smarter Investment Decisions Across Indices”. SSRN. DOI: http://dx.doi.org/10.2139/ssrn.5171811

Eastwood, J.P. et al. (2017): ”The economic impact of space weather: where do we stand?”. Risk Analysis. Wiley, Online Library. Vol. 37, No. 2. DOI: https://doi.org/10.1111/risa.12765

McFall-Johnsen, Morgan (n.d.): “13 times solar storms caused freak events on Earth, from detonating mines to crashing financial markets”. BUSINESS INSIDER. https://www.businessinsider.com/solar-storms-flares-dangerous-effects-earth-sun

Green, Lucie etal. (2016): “Building space weather resilience in the finance sector”. University College London Department of Space and Climate Physics. ResearchGate. DOI: https://doi.org/10.13140/RG.2.2.32458.21443

European Comission (n.d.): “Banking sector and financial stability”. European Semester Thematic Factsheet. https://commission.europa.eu/document/download/16aec668-c86b-47c6-a6d2-062b3a96e515_en?filename=european-semester_thematic-factsheet_banking-sector-financial-stability_en.pdf

Hall, Mary (2025): “The role and impact of the banking sector on the global economy”. Investopedia. https://www.investopedia.com/ask/answers/032315/what-banking-sector.asp

University College London (2016): “Building space weather resilience in the finance sector”. UCL Insights: Research Briefing. University College London. https://www.ucl.ac.uk/public-policy/sites/public_policy_redesign/files/pp_insights_research_briefing_-_space_weather_jul2016.pdf

Krausmann, Elisabeth et al. (2014): ”Space weatrher and financial systems: finding and outlook. An event co-organised by the European Comission’s Joint Research Centre, the UK Civil Contingencies Secretariat and the NOAA Space Weather Prediction Centre 27 June, 2014, London, UK”. JRC Publications. DOI: https://dx.doi.org/10.2788/18855

SANSA et al. (2017): “Economic impact of space weather”. SANSA Policy Brief. SANSA and Republic of South Africa Department of Science & Innovation. https://www.sansa.org.za/wp-content/uploads/2024/09/Economic-Impact-of-Space-Weather-April-2017.pdf

Green, Lucie (2016): “How space weather poses a risk to the finance industry”. The Conversation. https://theconversation.com/how-space-weather-poses-a-risk-to-the-finance-industry-64621

GFZ Helmholtz Centre for Geosciences (n.d.): ”Impact on technologies: impacts of space weather on technologies”. GFZ Helmholtz Centre for Geosciences. https://www.gfz.de/en/spotlights/space-weather/impact-on-technologies

Robotti, Cesare et al. (2003): “Playing the field: Geomagnetic storms and the stock market”. Federal Reserve Bank of Atlanta. Working Paper 2003-5b. DOI: https://dx.doi.org/10.2139/ssrn.375702

Wang, Connie X. et al. (2019): “Transduction of the Geomagnetic Field as Evidenced from alpha-Band Activity in the Human Brain”. eNeuro. 6(2):ENEURO.0483-18.2019. DOI: https://doi.org/10.1523/eneuro.0483-18.2019

National Research Council (2008): “Severe Space Weather Events–Understanding Societal and Economic Impacts: A Workshop Report”. Washington, DC: The National Academies Press. DOI: https://doi.org/10.17226/12643

AON (n.d.): “When the Sun strikes: preparing for the business impact of geomagnetic storms”.

https://aon.co.nz/AonNZ/media/Docs/27555-Geomagnetic-Storms-Insights-Whitepaper_v6-0.pdf

Fernholz, Tim (2022): “The entire global financial system depends on GPs, and it’s shockingly vulnerable to attack”. Tech & Innovation. QUARTZ. https://qz.com/1106064/the-entire-global-financial-system-depends-on-gps-and-its-shockingly-vulnerable-to-attack

The Economic Times (n.d.): “Internet, GPS system to be stopped by solar storm? Here's what researcher has claimed”. The Economic Times. https://economictimes.indiatimes.com/news/international/us/internet-gps-system-to-be-hampered-by-solar-storm-heres-what-researcher-claims/articleshow/105193622.cms?from=mdr

Oughton, Edward et al. (2017): “Quantifying the daily economic impact of extreme space weather due to failure in electricity transmission infrastructure”. AGU. Space Weather Journal Vol. 15, Issue 1. DOI: https://doi.org/10.1002/2016SW001491

Pinhasov, Igal (2024): “Are your GNSS systems ready for solar maximum? Here’s how to strengthen resilience against solar weather”. Technically Speaking Powered by ADTRAN. https://www.blog.adtran.com/en/are-your-gnss-systems-ready-for-solar-maximum

Ruffle, Simon (2016): “Understanding the economic impact of space weather risks”. Strategic RISK. https://www.strategic-risk-global.com/esg-risks/understanding-the-economic-impact-of-space-weather-risks/1419210.article

Lloyd's (n.d.): “Solar storm risk to the North American electric grid”. Lloyd's and the Atmospheric and Environmental Research, Inc. https://assets.lloyds.com/assets/pdf-solar-storm-risk-to-the-north-american-electric-grid/1/pdf-Solar-Storm-Risk-to-the-North-American-Electric-Grid.pdf

Tong, Yin et al. (2026): “Impact of space weather on electricity power grids: A review on economic consequences and National policy”. Frontiers. Astronomy and Space Sciences, Space Physics. https://www.frontiersin.org/journals/astronomy-and-space-sciences/articles/10.3389/fspas.2026.1733091/abstract

Lloyd’s (n.d.): “Extreme space weather, Shining a light on solar storms”. https://assets.lloyds.com/media/dea751c7-e4c5-4b12-9e40-a62971b8ad82/Lloyds_SolarStormsReport_3pp.pdf

Krivelyova, Anna et al. (2003): “Playing the field: Geomagnetic storms and international stock markets”. Working Paper. Federal Reserve Bank of Atlanta, GA. No. 2003-5a. https://www.econstor.eu/bitstream/10419/100979/1/wp2003-05a.pdf

Robotti, Cesare et al. (2003): “Playing the Field: Geomagnetic storms and the stock market”. ResearchGate. SSRN Electronic Journal. DOI: https://doi.org/10.2139/ssrn.375702

Brooks, Crystal (2025): “Effects of solar flares on Forex Market volatility”. Cospar2020. https://www.cospar2020.org/effects-of-solar-flares-on-forex-market-volatility/

Despond, Besile (2018): “Geomagnetic storms and stock market”. Department Physics, ETH Zürich. https://ethz.ch/content/dam/ethz/special-interest/mtec/chair-of-entrepreneurial-risks-dam/documents/dissertation/Despond%20Basile%20geomagnetic%20storms%20and%20the%20stock%20market.pdf

Krausmann, Elisabeth et al. (2013): “Space Weather and Power Grids: Findings and Outlook”. JRC Scientific and policy reports. European Commission. https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://publications.jrc.ec.europa.eu/repository/bitstream/JRC86658/lbna26370enn.pdf&ved=2ahUKEwiaqcy73uqUAxXPGRAIHY8LAKcQFnoECBcQAQ&usg=AOvVaw1V6xq0plVqy8t_7Ez-tFLy

European Central Bank (2020): “Guide on the supervisory approach to consolidation in the banking sector”. European Central Bank, Banking Supervision. https://www.bankingsupervision.europa.eu/ecb/pub/pdf/ssm.guideconsolidation2101~fb6f871dc2.en.pdf

Mishkin, Frederic S. et al. (1999): ”Financial consolidation: Dangers and opportunities”. ScienceDirect. Journal of Banking and Finance. Vol. 23 Issue 2-4. Pp. 675-691. DOI: https://doi.org/10.1016/S0378-4266(98)00084-3

Bank for International Settlements (n.d.): “Chapter III: Effects of consolidation on financial risk”. Bank for International Settlements. https://www.bis.org/publ/gten05ch3.pdf

Bank for International Settlements (n.d.): “Chapter VI: the fffects of consolidation on payment and settlement systems”. Bank for International Settlements. https://www.bis.org/publ/gten05ch6.pdf

International Monetary Fund (2001): “Consolidation in the financial sector: summary report”. Bank for International Settlements and International Monetary Fund. ISBN: 92-9131-612-1 https://www.imf.org/external/np/g10/2001/01/eng/pdf/fscssum.pdf

Nicolo, Gianni De et al. (2202): ”Systemic risk and financial consolidation: are they related?”. ScienceDirect. Journal of Banking and Finance. Vol. 26. Issue 5. Pp. 861-880. DOI: https://doi.org/10.1016/S0378-4266(02)00211-X

Kam, Warren, Wai Tong (2025): “Solar influences on financial markets: toward smarter investment decisions across indices”. SSRN. DOI: https://dx.doi.org/10.2139/ssrn.5171811

Robotti, Cesare et al. (2003): “Playing the field: geomagnetic storms and the stock market”. Federal Reserve Bank of Atlanta Working Paper. No. 2003-5b. SSRN. DOI: https://dx.doi.org/10.2139/ssrn.375702

Lifang, Peng et al. (2019): ”Effect of Ap-Index of geomagnetic activity on S&P 500 stock market return”. WILEY Online Library. Journal: Advances in Astronomy. DOI: https://doi.org/10.1155/2019/2748062

Arshadigbal (n.d.): ”Geomagnetic storms and stock market impact”. Scribd.https://www.scribd.com/document/825821467/Week-13-14

Thi Hao Hong, Nguyen et al. (2023): “Does weather anomaly still affect the emerging stock market under the unexpected event? New evidence from the COVID-19 pandemic”. National Library of Medicine, National Center for Biotechnology Information. DOI: https://doi.org/10.1016/j.heliyon.2023.e18665

Jindal, Priya (2017): “Geomagnetic storm and it’s effects on financial Mar Ket”. Academia. https://www.academia.edu/69864487/Geomagnetic_Storm_and_It_s_Effects_on_Financial_Mar_Ket

Kristoufek, Ladislav (2018): ”Does solar activity affect human happiness?”. ScineceDirect. Physica A: Statistical Mechanics and its Applications. Vol. 493. Pp. 47-53. DOI: https://doi.org/10.1016/j.physa.2017.10.031

Babayev, Elchin S. et al. (2007): “Effects of geomagnetic activity variations on the physiological and psychological state of functionally healthy humans: Some results of Azerbaijani studies”. ScienceDirect. Journal of Advances in Space Research. Vol. 40, Issue 12. Pp. 1941-1951. DOI: https://doi.org/10.1016/j.asr.2007.02.099

Garvey, Raven et al. (2025): “Weird space weather seems to have influenced human behavior on Earth 41,000 years ago – our unusual scientific collaboration explores how”. Space.com. https://www.space.com/astronomy/earth/weird-space-weather-seems-to-have-influenced-human-behavior-on-earth-41-000-years-ago-our-unusual-scientific-collaboration-explores-how

Close, James (2012): “Are stress responses to geomagnetic storms mediated by the cryptochrome compass system?”. National Library of Medicine: National Center for Biotechnology Information. 279(1736. Pp. 2081-2090. DOI: https://doi.org/10.1098/rspb.2012.0324

Arshadigbal (n.d.): ”Geomagnetic storms and stock market impact”. Scribd.https://www.scribd.com/document/825821467/Week-13-14

Kam, Warren, Wai Tong (2025): “Solar influences on financial markets: toward smarter investment decisions across indices”. SSRN. DOI: https://dx.doi.org/10.2139/ssrn.5171811

Hanzelka, Michael et al. (2021): ”Human psychophysiology is influenced by low-level magnetic fields: solar activity as the cause”. MDPI. Journal of Atmosphere. Special Issue: The Effect of Helio-Geomagnetic Activity in the Geo-Environment and by Extension to Human Health. Vol. 12, Issue 12. DOI: https://doi.org/10.3390/atmos12121600

Zakharov, Ivan et al. (2001): “The effect of solar activity on ill and healthy people under conditions of neurous and emotional stresses”. ResearchGate. Journal of Adnaces in Space Research 2 8(4):685-9. DOI: https://doi.org/10.1016/S0273-1177(01)00379-9

Tracy, Samantha M. et al. (2022): ” Associations between solar and geomagnetic activity and peripheral white blood cells in the Normative Aging Study”. ScienceDirect. Journal of Environmental Research. Vol. 204, Part B. DOI: https://doi.org/10.1016/j.envres.2021.112066

Hoplon