At 7:30 a.m. on July 29, 1968, Arenal Volcano in Costa Rica erupted violently after more than 400 years of dormancy. The explosion devastated nearby communities, killing 87 people and burying over 15 square kilometers under lava, ash, and rock. In total, the eruption affected more than 232 square kilometers, destroying crops, forests, and property. During the peak of activity, Arenal ejected massive lava flows, ash columns, and rocks traveling up to a mile at speeds of nearly 600 meters per second. The eruption also created three new craters, permanently changing the volcano’s structure.
Following 1968, Arenal remained one of Costa Rica’s most active volcanoes, frequently emitting ash plumes, lava flows, and pyroclastic materials for decades. The last major eruption occurred on May 8, 1998, causing temporary evacuations but no injuries.
Is Arenal Volcano Active?
Yes, Arenal Volcano is still considered active, although it has been in a resting phase since 2010. That incident in 1968 was its most significant event in recent history. Today, visitors can safely explore the area and even check the Arenal Volcano live cam online for real-time views. You can watch the live status of Arenal Volcano here.
Historical and Cultural Background
Before the 1968 explosion of Arenal Volcano, it was a symmetrical, forest-covered volcanic cone, known locally as Arenal Peak, Pan de Azúcar (Sugarloaf), Canasta Volcano, and Río Frío Volcano. The surrounding region had been inhabited for thousands of years, and indigenous Guatuso people believed Arenal was the home of the God of Fire, reflecting the volcano’s spiritual significance. Geologically, Arenal is relatively young—only about 4,000 years old. Scientists have identified lava flows dating back to around 1500 AD, marking its earlier periods of activity. Rising 1,633 meters (5,358 feet) above sea level, Arenal’s summit continues to shift slightly due to ongoing volcanic processes.
See the power of nature up close with a guided trip to Arenal Volcano and the surrounding rainforest. Our Trip Planners can design a personalized Costa Rica itinerary that includes volcano hikes, hot springs, and wildlife experiences tailored just for you.
Orange glow from the crater of Arenal Volcano (Denis Mason)
