Indonesian rescue teams are searching for five photojournalists, two crew members, and a guide who went missing while traveling by speedboat to cover eruptions of Anak Krakatau volcano in the Sunda Strait. The group left from Carita, a coastal town in Banten province, heading toward the volcanic island. The last message from the boat was received by a relative of a journalist on board at 6:13 p.m. on Monday, indicating the group had reached the waters near Anak Krakatau. They have not been heard from since. The five journalists worked for Indonesia's state news agency Antara, Turkey's Anadolu Agency, and several local and foreign media outlets. Their last known location was approximately 18.5 kilometers (11.5 miles) from the shore. Rescuers have been deployed since Tuesday, but they have not yet established contact with the group or determined their current location. The initial eruption of Anak Krakatau ended on Sunday, but the volcano has continued to erupt intermittently, with explosions sending lava, ash, and glowing volcanic material into the air. The eruption led to the closure of several airports on Sunday and Monday, disrupting nearly 2,961 flights, including 622 international services, and affecting about 341,000 passengers. In response, the government allowed schools in areas affected by volcanic ash to switch temporarily to online learning to protect students from exposure to the ash. Anak Krakatau, which means "child of Krakatau," formed from the remnants of the original Krakatau volcano, whose massive 1883 eruption nearly destroyed the island and caused a period of global cooling. A 2018 eruption of Anak Krakatau triggered a tsunami that killed at least 430 people in Sumatra and Java. Since July, the volcano has been at Indonesia's second-highest alert level, and authorities have advised residents, tourists, and fishermen to stay at least 3 kilometers (1.9 miles) away from the active crater. Indonesia is home to more than 120 active volcanoes, and eruptions are common due to the country's location along the Pacific "Ring of Fire." This is a zone of seismic activity that circles the Pacific Ocean and is responsible for most of the world's earthquakes and volcanic eruptions.