What was the 1979 energy crisis?
The 1979 energy crisis, also called the second oil shock of the 1970s, followed a severe disruption in Iranian oil production during the Iranian Revolution. World oil prices rose rapidly in 1979 and into 1980, gasoline shortages and long lines appeared in parts of the United States, and an already serious inflation problem became harder to manage.
The crisis is often summarized too simply as “OPEC cut off the United States.” That description mixes the 1979 episode with the 1973-1974 Arab oil embargo.
The 1979 shock was different. Iranian production collapsed during the revolution, other producers replaced part of the lost supply, and prices were amplified by strong world demand, precautionary inventory building, fear of additional disruptions, and producer pricing decisions.
1979 was not the 1973 Arab oil embargo
The first oil shock of the decade began in October 1973 when Arab oil producers imposed an embargo on the United States and some other countries during the Arab-Israeli war. Federal Reserve History describes that embargo as lasting into early 1974.
The second shock began with turmoil in Iran in late 1978 and early 1979.
A useful distinction is:
11973-1974:
2Arab oil embargo + production cuts
3
41978-1980:
5Iranian Revolution + Iranian production collapse
6+ strong demand + precautionary buying + broader market responseTreating these as the same event obscures why prices moved and what policymakers were responding to.
How much Iranian oil production was lost?
The Iranian Revolution began in 1978 and culminated in the fall of Shah Mohammad Reza Pahlavi's government in early 1979.
Federal Reserve History estimates that Iranian oil output had fallen by about 4.8 million barrels per day, roughly 7% of world production at the time, by January 1979.
The U.S. Energy Information Administration reports that Iran's initial production loss approached 90% of the country's output in January 1979 and that average Iranian crude production over 1978 through 1981 was about 3.9 million barrels per day lower than before the disruption.
Those are large numbers, but the gross Iranian loss was not the same thing as the net global supply shortfall. Other OPEC producers increased output and replaced part of the missing barrels.
That distinction is central to understanding the episode.
Why did oil prices rise more than the net shortage alone might suggest?
A physical supply disruption can change behavior before the final missing-barrel count is known.
Federal Reserve History points to several forces operating together:
- the Iranian production collapse;
- strong global oil demand;
- fear that additional disruptions would follow;
- precautionary demand and inventory accumulation; and
- speculative hoarding.
Oil buyers who feared that crude would become harder or more expensive to obtain had an incentive to secure supplies early. That extra demand for inventories pushed on the same market already dealing with lost production.
Federal Reserve History notes that oil prices more than doubled between April 1979 and April 1980.
A Department of Energy historical review similarly observes that the direct U.S. share of the net supply shortfall was much smaller than the headline Iranian production collapse and that panic buying and inventory accumulation helped push spot prices sharply higher.
The lesson is broader than this one event: commodity prices respond to expected future scarcity and inventory behavior, not only to the current physical shortfall.
Why were there gasoline lines in the United States?
A world crude-oil disruption does not map cleanly into the same percentage shortage at every U.S. gasoline station.
Regional supply, refinery operations, inventories, price and allocation rules, consumer behavior, and expectations all affected local availability. When drivers expected gasoline to become scarce, topping off tanks earlier than usual could itself increase near-term demand and make lines worse.
Federal Reserve History records gasoline rationing in nine California counties in May 1979. The episode became politically memorable partly because a relatively modest net supply imbalance could still create severe local disruption when distribution and expectations interacted badly.
This is why “the world lost X% of supply, so every station should have had X% less gasoline” is the wrong mental model.
Oil prices and inflation
The oil shock hit an economy that was already experiencing accelerating inflation.
Federal Reserve History reports that U.S. consumer-price inflation had climbed from below 5% in early 1976 to nearly 7% by March 1979, before the full 1979 oil-price surge had worked through the economy. Twelve-month inflation reached about 9% by the end of 1979.
Higher petroleum prices can raise costs directly through gasoline, heating, transportation, petrochemicals, and energy-intensive production. They can also affect inflation expectations and wage-price behavior.
But the Great Inflation cannot be explained by oil alone. Monetary policy, demand conditions, productivity, earlier price shocks, fiscal forces, expectations, and the institutional environment all mattered.
A good historical reading therefore avoids two extremes:
- “the oil shock caused all of the inflation”; and
- “the oil shock was irrelevant because inflation had already started.”
The energy shock worsened an existing inflation problem and complicated the policy response.
The Federal Reserve response and Paul Volcker
President Jimmy Carter nominated Paul Volcker to chair the Federal Reserve in 1979. Volcker took office in August and pushed the Federal Open Market Committee toward a much more aggressive anti-inflation stance.
In October 1979, the Fed announced a change in operating procedures that placed greater emphasis on controlling money and reserve growth. Interest rates became extremely volatile and rose to very high levels during the subsequent fight against inflation.
The oil shock and monetary tightening should not be collapsed into one cause-and-effect statement. Inflation was already entrenched, the Iranian disruption added another major price shock, and the Fed then chose a forceful response aimed at restoring price stability.
The tightening contributed to painful recessions in 1980 and 1981-1982 before inflation ultimately fell sharply.
For the mechanics of rate policy, see Federal Funds Rate and Monetary Policy.
The Iran-Iraq War extended energy-market stress
The Iranian Revolution was not the end of Middle East supply risk.
In September 1980, Iraq invaded Iran, beginning the Iran-Iraq War. Oil production from both countries was disrupted, adding another shock to a market still adjusting to the 1979 crisis.
This chronology matters because “the 1979 crisis” is often used as shorthand for a multi-year period of energy stress. The original Iranian revolutionary disruption and the later Iran-Iraq War were separate events with overlapping market consequences.
How high prices changed supply and demand
High oil prices create incentives on both sides of the market.
Consumers and businesses have reasons to conserve fuel, buy more efficient equipment, and change behavior. Producers have incentives to invest in exploration, development, and alternative sources of supply.
EIA's historical timeline notes that high prices contributed to lower oil consumption and that new supply eventually helped create excess capacity. By the mid-1980s, oil-market conditions had changed dramatically from the scarcity psychology of 1979.
This is a useful reminder when analyzing commodity shocks: the demand and supply curves are not fixed. Persistent high prices can create the response that eventually weakens the shortage.
Policy and energy-security consequences
The 1970s oil shocks accelerated U.S. attention to energy security, conservation, domestic production, and alternatives to imported petroleum.
Several major policy changes actually predated the 1979 crisis. The Energy Policy and Conservation Act of 1975, passed after the first oil shock, created the Strategic Petroleum Reserve and established fuel-economy policy. The National Energy Act of 1978 also preceded the Iranian production collapse.
The 1979 episode reinforced those concerns rather than single-handedly creating modern energy policy.
That chronology is important because retrospective articles often credit the second oil shock with policies that were already enacted in response to the broader 1970s energy problem.
What investors can learn from the 1979 shock
The event is useful less as a template for predicting the next oil crisis than as a framework for analyzing commodity shocks.
Separate gross disruption from net market shortage
A producer can lose millions of barrels per day while other producers offset part of the loss. Measure both.
Watch inventories and precautionary demand
Buyers responding to fear of future scarcity can amplify the near-term price move.
Distinguish spot shock from macroeconomic backdrop
The effect of an oil shock depends on inflation, monetary policy, growth, spare production capacity, and household/business balance sheets at the time.
Expect substitution and adaptation
High prices affect conservation, technology, production investment, and policy. A shortage mechanism can weaken as participants adapt.
Avoid one-variable market stories
Oil prices, inflation, interest rates, stocks, and economic growth influence one another through multiple channels. Historical coincidence does not establish one simple causal chain.
A concise timeline
| Date | Event |
|---|---|
| 1978 | Iranian Revolution intensifies and oil production begins to fall |
| January 1979 | Iranian output reaches an extreme disruption point |
| February 1979 | Shah's monarchy has fallen and the new revolutionary government consolidates power |
| Mid-1979 | Oil prices and U.S. gasoline-market stress intensify |
| August 1979 | Paul Volcker becomes Federal Reserve chair |
| October 1979 | Federal Reserve announces new anti-inflation operating procedures |
| April 1980 | Oil prices are more than twice their April 1979 level according to Federal Reserve History |
| September 1980 | Iran-Iraq War begins, creating another major regional supply shock |
The dates show why the phrase “1979 energy crisis” should be understood as part of a broader 1978-1980 oil-market episode rather than one embargo announcement.
Sources and further reading
- Federal Reserve History: Oil Shock of 1978-79
- Federal Reserve History: Oil Shock of 1973-74
- U.S. Energy Information Administration: Effects of crude oil supply disruptions
- U.S. Energy Information Administration: Oil petroleum timeline
- U.S. Department of Energy: Timeline of Events, 1971 to 1980
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