The Volcano Closest To Los Angeles

Living in Southern California means living dangerously close to a volcano that could erupt at any time. For those in the Los Angeles area, the threat of volcanic activity feels imminent when the ground shakes from an earthquake or plumes of smoke can be seen on the horizon on a clear day.

If you’re short on time, here’s a quick answer to your question: The closest volcano to downtown Los Angeles is the Salton Buttes, located approximately 130 miles southeast near the Salton Sea.

An Overview of Volcanoes Near Los Angeles

When we think of natural disasters in California, earthquakes often come to mind. However, not many people are aware that there are also volcanoes in close proximity to Los Angeles. While these volcanoes may not be as famous or active as those in other parts of the world, they still pose a potential threat to the region.

The Threat of Volcanic Activity in California

California is known for its seismic activity, but volcanic activity is also a concern. The state has a long history of volcanic eruptions, with the most recent eruption occurring just over 100 years ago.

The eruption of Lassen Peak in 1915 serves as a reminder that volcanic activity can still occur in California.

Volcanic eruptions can cause a wide range of hazards, including ashfall, pyroclastic flows, and lava flows. These hazards can pose a threat to human life, infrastructure, and the environment. Therefore, it is important to be aware of the volcanoes near Los Angeles and the potential risks they present.

Key Volcanoes To Know Near Los Angeles

While there are no active volcanoes in Los Angeles County, there are several dormant or potentially active volcanoes nearby. One of the most prominent is Mount Shasta, located in Northern California. Standing at over 14,000 feet, Mount Shasta is a stratovolcano that last erupted in 1786.

It is considered one of the most likely volcanoes in California to erupt in the future.

Another volcano to be aware of is Mammoth Mountain, located in the Eastern Sierra Nevada. Mammoth Mountain is a popular skiing destination, but it is also a potentially active volcano. The last eruption occurred around 50,000 years ago, and there has been recent volcanic activity, including the release of toxic gases in the 1980s.

While the volcanoes near Los Angeles may not be as well-known as others around the world, they still deserve our attention. It is important to stay informed about the potential risks and be prepared in case of volcanic activity.

Remember, being prepared can help save lives and minimize the impact of a volcanic eruption.

The Salton Buttes – The Volcano Closest to LA

Location and Geography

The Salton Buttes, also known as the Salton Sea Volcanic Field, is a group of volcanic domes located in Southern California, just southeast of Los Angeles. It is considered the closest active volcano to the bustling city.

The volcanic field sits within the Salton Trough, a geological basin that stretches from the Coachella Valley to the Gulf of California. The Buttes are part of a larger volcanic complex that includes the Salton Sea and the nearby volcanic vents.

Eruption History and Lava Flows

The Salton Buttes have a complex eruption history, with the most recent eruptions occurring approximately 1,800 years ago. These eruptions resulted in the formation of the domes that we see today. The volcanic activity in the area has produced a variety of lava flows, including basaltic and andesitic compositions.

The lava flows from the Salton Buttes have traveled several miles from their source, leaving behind distinct geological features.

One notable lava flow from the Salton Buttes is the Obsidian Butte flow, which extends for about 6 miles. This flow is composed of black, glassy obsidian, a type of volcanic glass. Obsidian is formed when lava cools rapidly, preventing the growth of crystals.

The Obsidian Butte flow is a popular destination for geology enthusiasts and hikers.

Monitoring for Future Eruptions

While the Salton Buttes are currently dormant, scientists continue to monitor the area for signs of potential future eruptions. The United States Geological Survey (USGS) operates a network of seismometers and gas monitoring stations to detect any volcanic activity.

These monitoring efforts help to ensure the safety of nearby communities and provide valuable data for understanding volcanic processes.

It’s important to note that the Salton Buttes are not considered a significant volcanic hazard at this time. The area experiences occasional seismic activity and the release of volcanic gas, but no imminent eruption is expected.

Visitors to the Salton Buttes can safely explore the unique geological features and appreciate the volcanic history of the region.

For more information about the Salton Buttes and other volcanoes in Southern California, visit the USGS Volcano Hazards Program website.

Other Notable Volcanoes Near Los Angeles

Long Valley Caldera

If you’re interested in exploring volcanic activity close to Los Angeles, the Long Valley Caldera is a must-visit. Located in eastern California, this massive volcanic depression spans approximately 20 miles long and 11 miles wide. It is one of the largest calderas in the United States.

The Long Valley Caldera last experienced a major eruption about 760,000 years ago, but it still remains an active volcanic area with ongoing geothermal activity. So, if you’re up for a unique adventure, don’t miss the chance to witness this geological wonder!

Clear Lake Volcanic Field

Another notable volcanic field near Los Angeles is the Clear Lake Volcanic Field, situated in northern California. This volcanic field consists of numerous volcanic domes, lava flows, and explosion craters. The most recent eruption in this field occurred around 11,000 years ago.

Clear Lake, the largest freshwater lake in California, is a result of volcanic activity in the area. The Clear Lake Volcanic Field is not only a fascinating geological site but also offers stunning views and recreational opportunities for visitors.

Lassen Volcanic Center

Located in northeastern California, the Lassen Volcanic Center is home to Lassen Peak, an active volcano and the largest plug dome volcano in the world. The most recent eruptions in this area occurred between 1914 and 1917, making it the most recent volcanic activity in the contiguous United States.

The Lassen Volcanic Center offers various hiking trails, scenic drives, and opportunities to witness volcanic features such as fumaroles, hot springs, and mud pots. It’s a unique destination for adventure seekers and nature enthusiasts alike.

Coso Volcanic Field

The Coso Volcanic Field, located in Inyo County, California, is another noteworthy volcanic area near Los Angeles. This volcanic field is known for its geothermal resources and unique volcanic features.

With over 400 volcanic vents and a history of volcanic activity spanning over 4 million years, the Coso Volcanic Field is a geologist’s paradise. It is also recognized as one of the top geothermal areas in the world.

Visitors can explore the area’s hot springs, fumaroles, and volcanic rocks while learning about the fascinating geological processes that have shaped the landscape.

Be Prepared: Volcano Preparedness Tips for LA Residents

Have an Emergency Plan and Kit

Living close to a volcano means being prepared for potential eruptions and volcanic activity. As a resident of Los Angeles, it’s important to have an emergency plan and kit in place. Develop a family emergency plan that includes communication strategies, meeting points, and contact information for local authorities.

Ensure that your emergency kit contains essential items such as non-perishable food, water, flashlights, batteries, a first aid kit, and any necessary medications. Being prepared can help you and your loved ones stay safe in the event of an eruption.

Monitor Activity and News Updates

Stay informed about the latest volcanic activity by regularly monitoring updates from local authorities, such as the United States Geological Survey (USGS) or the National Weather Service. These organizations provide real-time information on volcanic activity, including eruption warnings, ashfall predictions, and evacuation notices.

Sign up for alerts and notifications to receive timely updates directly to your phone or email. Remember, staying informed is crucial for making well-informed decisions about your safety and that of your family.

Know Your Evacuation Routes

In the event of a volcanic eruption, it’s important to know your evacuation routes and have a plan in place. Familiarize yourself with the designated evacuation zones in your area and identify multiple routes to reach safe locations.

Keep in mind that roads may become congested during an evacuation, so having alternative routes can be beneficial. Additionally, have a plan for transporting pets and livestock if you have any. Being prepared and knowing your evacuation routes can help you evacuate quickly and safely.

Protect Your Home and Property

Take proactive steps to protect your home and property from potential volcanic hazards. Clear your gutters and roof of any debris that could be a fire hazard if volcanic ash were to fall. Consider installing screens or covers on your windows and vents to prevent ash from entering your home.

If you have a swimming pool or water storage tanks, cover them to prevent contamination. It’s also a good idea to review your insurance coverage to ensure it includes volcanic eruptions. Taking these precautions can help minimize damage and protect your investments.


While a volcanic eruption near Los Angeles may seem unlikely, the threat is real from the active volcanoes located within 150 miles of the city. Knowledge and preparation are key to staying safe, along with monitoring warning signs of increased volcanic activity. While the Salton Buttes volcano in the southeast desert poses the most immediate risk, other volcanic areas including Long Valley, Clear Lake, Lassen, and the Coso Range bear close watching. With proper vigilance and emergency planning, Los Angeles residents can rest easier knowing they are ready to react if the ground starts to rumble from molten lava flowing underground.

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