Last Updated on June 6, 2026 by Staff
For a time famines have been a big problem for humans causing a lot of suffering and affecting the rise and fall of societies. A new study says that volcanic eruptions may have played a role in causing famines in China than people thought.
Researchers looked at records from 1440 to 1900 and found a pattern that linked volcanic eruptions to climate problems, crop failures and food shortages. Volcanoes were rarely the cause of famines but they often made it more likely for agricultural crises to happen.
The study, which was published in Climate of the Past gives insight into how natural disasters can interact with social and economic problems to create big humanitarian challenges.
Volcanoes and Climate
When a volcano erupts it can affect the climate beyond where it happens. The eruption releases sulfur- gases into the air, which form tiny particles that reflect sunlight back into space.
This can cause temperatures to drop for months or even years after the eruption. Rainfall patterns can also change, causing droughts in some areas and flooding in others.
One of the famous examples is the eruption of Mount Tambora in 1815 which led to the “Year Without a Summer” in 1816. The cold temperatures caused crop failures across Europe and North America.
The new research says that similar climate disruptions happened in China throughout its history creating conditions that increased the risk of famine.
Evidence from History
To investigate the connection between eruptions and food shortages researcher Richard Warren used the REACHES climate database. This database has detailed records of temperature, drought, flooding, crop failures and famine events across China.
The study compared these records with the timing of volcanic eruptions and found strong links between eruptions and environmental disturbances.
In China famine events often happen in the same year as a volcanic eruption.
In China the effects appeared more slowly. Famine risks often increased one to three years after an eruption.
Southern China showed a pattern with famine events most commonly occurring in the year following an eruption.
These regional differences show that environmental shocks do not affect all areas in the way.
More Than One Cause
The study found connections between volcanic activity and famine risk but researchers say that eruptions did not directly cause famines on their own.
Historical food crises were usually caused by factors. Climate changes triggered by eruptions could reduce crop yields. Other pressures often determined whether a shortage turned into a full-scale famine.
These pressures included droughts, floods, disease outbreaks, food price increases, political instability and government responses.
The study describes these interactions as feedback loops. For example a poor harvest can increase food prices making it harder for people to buy food.
This means volcanoes should be viewed as factors that increase vulnerability rather than direct causes of disaster.
Lessons for Today
While the study focuses on China its conclusions are highly relevant to the modern world. Today’s societies benefit from technology, global trade networks and improved food distribution systems. However food security remains vulnerable to disruptions.
Scientists have warned that a future large volcanic eruption could still affect crop production, transportation networks and food supplies. Understanding how past societies responded to climate shocks can help modern governments prepare for challenges.
The research highlights the importance of resilience. Communities that have food systems, effective governance and emergency planning are better equipped to handle environmental stress.
Volcanic eruptions can set off a chain reaction of climate changes and social pressures. While they may not directly create famines they can significantly increase the risk of crisis when combined with existing vulnerabilities.
By learning from the past researchers hope societies can better prepare for disruptions and reduce the chances that natural events evolve into large-scale humanitarian disasters.