Relief workers worked to clear up rubble of collapsed buildings Tuesday on an Indonesian island where a deadly earthquake left thousands of people homeless.

The 6.2 magnitude earthquake Friday that killed at least 84 people was one of multiple recent disasters in Indonesia.

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Rescuers leading a sniffer dog pause during a search operation at the ruins of a building collapsed in Friday's earthquake in Mamuju, West Sulawesi, Indonesia, Monday, Jan. 18, 2021. Aid was reaching the thousands of people left homeless and struggling after the earthquake that killed a number of people in the province where rescuers intensified their work Monday to find those buried in the rubble. (AP PhotoJoshua Marunduh)

Relief workers worked to clear up rubble of collapsed buildings Tuesday on an Indonesian island where a deadly earthquake left thousands of people homeless.

A woman walks outside a tent at a soccer field that is turned into temporary shelter for those displaced by an earthquake Mamuju, West Sulawesi, Indonesia, Monday, Jan. 18, 2021. Aid was reaching the thousands of people left homeless and struggling after the earthquake that killed a number of people in the province where rescuers intensified their work Monday to find those buried in the rubble. (AP PhotoBamu Saseno)

The National Search and Rescue Agency counted at least 30,000 survivors who have moved to shelters in the hard-hit city of Mamuju and its neighboring district of Majene in West Sulawesi, as the government and aid agencies pooled efforts to meet the survival needs of shaken communities.

A cat is seen through the rubble of a house badly badly damaged by earthquake in Mamuju, West Sulawesi, Indonesia, Tuesday, Jan. 19, 2021. Aid was reaching the thousands of people left homeless and struggling after an earthquake that killed a number of people struck early Friday. (AP PhotoYusuf Wahil)

Before he arrived in Mamuju on Tuesday, Widodo mobilized military and police to support rescue and relief operations.

Residents build tents outside their house badly damaged by earthquake in Mamuju, West Sulawesi, Indonesia, Tuesday, Jan. 19, 2021. Aid was reaching the thousands of people left homeless and struggling after an earthquake that killed a number of people struck early Friday. (AP PhotoYusuf Wahil)

The quake and flood disasters follow a deadly landslide in West Java on Jan. 9 that left 40 people buried in tons of mud. On the same day, a Sriwijaya Air jet nosedived into the Java Sea, killing all 62 people on board.

Indonesian National Transportation Safety Committee investigators inspect debris found in the waters around the location where a Sriwijaya Air passenger jet crashed, at the search and rescue command center at Tanjung Priok Port in Jakarta, Indonesia, Monday, Jan 18, 2021. (AP PhotoAchmad Ibrahim)

Indonesia, home to more than 260 million people, is lined with seismic faults and is frequently hit by earthquakes, volcanic eruptions and tsunamis.

Hot lava flows from the crater of Mount Semeru as its activity continues in this photo taken with slow shutter speed in Lumajang, East Java, Indonesia, late Sunday, Jan. 17, 2021. The highest volcano on Indonesia's most densely populated island of Java, spewed hot clouds as far away as 4.5 kilometers (nearly 3 miles) on Saturday. There were no immediate evacuations, but the National Disaster Mitigation Agency warned people who live in the villages on the slopes of the 3,676-meter (12,060-foot)-high mountain to be vigilant in looking for signs of danger. (AP PhotoHendra Permana)

Hot lava flows from the crater of Mount Semeru as its activity continues in this photo taken with slow shutter speed in Lumajang, East Java, Indonesia, late Sunday, Jan. 17, 2021. The highest volcano on Indonesia's most densely populated island of Java, spewed hot clouds as far away as 4.5 kilometers (nearly 3 miles) on Saturday. There were no immediate evacuations, but the National Disaster Mitigation Agency warned people who live in the villages on the slopes of the 3,676-meter (12,060-foot)-high mountain to be vigilant in looking for signs of danger. (AP PhotoHendra Permana)

People use a makeshift raft to cross through a flooded village in Banjar, South Kalimantan on Borneo Island, Indonesia, in this Saturday, Jan. 16, 2021 photo. Many thousands of people have been evacuated and a number have been killed in recent days in flooding on Indonesia's Borneo island, officials said Sunday. (AP PhotoPutra)

People use a makeshift raft to cross through a flooded village in Banjar, South Kalimantan on Borneo Island, Indonesia, in this Saturday, Jan. 16, 2021 photo. Many thousands of people have been evacuated and a number have been killed in recent days in flooding on Indonesia's Borneo island, officials said Sunday. (AP PhotoPutra)

Rescuers assist an elderly man to climb into their boat at a flooded village in Banjar, South Kalimantan on Borneo Island, Indonesia, in this Saturday, Jan. 16, 2021 photo. Many thousands of people have been evacuated and a number have been killed in recent days in flooding on Indonesia's Borneo island, officials said Sunday. (AP PhotoPutra)

Rescuers assist an elderly man to climb into their boat at a flooded village in Banjar, South Kalimantan on Borneo Island, Indonesia, in this Saturday, Jan. 16, 2021 photo. Many thousands of people have been evacuated and a number have been killed in recent days in flooding on Indonesia's Borneo island, officials said Sunday. (AP PhotoPutra)

President Joko Widodo visited a flood-hit area on Borneo island on Monday and was scheduled to visit the quake-hit areas of West Sulawesi province Tuesday to reassure people the government’s response is reaching those struggling after the quake.

Rescuers leading a sniffer dog pause during a search operation at the ruins of a building collapsed in Friday's earthquake in Mamuju, West Sulawesi, Indonesia, Monday, Jan. 18, 2021. Aid was reaching the thousands of people left homeless and struggling after the earthquake that killed a number of people in the province where rescuers intensified their work Monday to find those buried in the rubble. (AP PhotoJoshua Marunduh)

Rescuers leading a sniffer dog pause during a search operation at the ruins of a building collapsed in Friday's earthquake in Mamuju, West Sulawesi, Indonesia, Monday, Jan. 18, 2021. Aid was reaching the thousands of people left homeless and struggling after the earthquake that killed a number of people in the province where rescuers intensified their work Monday to find those buried in the rubble. (AP PhotoJoshua Marunduh)

The National Search and Rescue Agency counted at least 30,000 survivors who have moved to shelters in the hard-hit city of Mamuju and its neighboring district of Majene in West Sulawesi, as the government and aid agencies pooled efforts to meet the survival needs of shaken communities.

Four days after the disaster, the streets of the provincial capital Mamuju were still covered in debris and most people have slept outdoors, fearful their homes would crumble if strong aftershocks come.

On Tuesday, sniffer dogs were again used in the search for bodies and possible survivors in Mamuju, a city of nearly 300,000 people, strewn with debris from collapsed buildings. The governor’s office building was almost flattened and a shopping mall was reduced to a crumpled hulk.

A woman walks outside a tent at a soccer field that is turned into temporary shelter for those displaced by an earthquake Mamuju, West Sulawesi, Indonesia, Monday, Jan. 18, 2021. Aid was reaching the thousands of people left homeless and struggling after the earthquake that killed a number of people in the province where rescuers intensified their work Monday to find those buried in the rubble. (AP PhotoBamu Saseno)

A woman walks outside a tent at a soccer field that is turned into temporary shelter for those displaced by an earthquake Mamuju, West Sulawesi, Indonesia, Monday, Jan. 18, 2021. Aid was reaching the thousands of people left homeless and struggling after the earthquake that killed a number of people in the province where rescuers intensified their work Monday to find those buried in the rubble. (AP PhotoBamu Saseno)

Before he arrived in Mamuju on Tuesday, Widodo mobilized military and police to support rescue and relief operations.

The president had traveled Monday to flood-affected areas in South Kalimantan province on Borneo, the island known for rainforests and orangutans where floods since last week have inundated several regions. The floods killed several villagers and forced tens thousands of people to flee their homes. Floods also reported in many other provinces in the vast archipelago nation.

Widodo said rainfall caused the floods in South Kalimantan, but environmentalists blame deforestation by mining, palm oil and agricultural industries.

A cat is seen through the rubble of a house badly badly damaged by earthquake in Mamuju, West Sulawesi, Indonesia, Tuesday, Jan. 19, 2021. Aid was reaching the thousands of people left homeless and struggling after an earthquake that killed a number of people struck early Friday. (AP PhotoYusuf Wahil)

A cat is seen through the rubble of a house badly badly damaged by earthquake in Mamuju, West Sulawesi, Indonesia, Tuesday, Jan. 19, 2021. Aid was reaching the thousands of people left homeless and struggling after an earthquake that killed a number of people struck early Friday. (AP PhotoYusuf Wahil)

The quake and flood disasters follow a deadly landslide in West Java on Jan. 9 that left 40 people buried in tons of mud. On the same day, a Sriwijaya Air jet nosedived into the Java Sea, killing all 62 people on board.

Indonesia also last week began vaccinating health workers with a COVID-19 vaccine in a campaign that aims to immunize two-thirds of the population in the world’s fourth most populous country. It has confirmed more than 917,000 infections and 26,000 deaths from the pandemic, the most in Southeast Asia.

And on Saturday, in other part of the country, Mount Semeru, the highest volcano on Indonesia’s most densely populated island of Java, spewed hot clouds as far away as 4.5 kilometers (nearly 3 miles). The eruption caused panic but no apparent casualties.

Residents build tents outside their house badly damaged by earthquake in Mamuju, West Sulawesi, Indonesia, Tuesday, Jan. 19, 2021. Aid was reaching the thousands of people left homeless and struggling after an earthquake that killed a number of people struck early Friday. (AP PhotoYusuf Wahil)

Residents build tents outside their house badly damaged by earthquake in Mamuju, West Sulawesi, Indonesia, Tuesday, Jan. 19, 2021. Aid was reaching the thousands of people left homeless and struggling after an earthquake that killed a number of people struck early Friday. (AP PhotoYusuf Wahil)

Indonesia, home to more than 260 million people, is lined with seismic faults and is frequently hit by earthquakes, volcanic eruptions and tsunamis.

Indonesian National Transportation Safety Committee investigators inspect debris found in the waters around the location where a Sriwijaya Air passenger jet crashed, at the search and rescue command center at Tanjung Priok Port in Jakarta, Indonesia, Monday, Jan 18, 2021. (AP PhotoAchmad Ibrahim)

Indonesian National Transportation Safety Committee investigators inspect debris found in the waters around the location where a Sriwijaya Air passenger jet crashed, at the search and rescue command center at Tanjung Priok Port in Jakarta, Indonesia, Monday, Jan 18, 2021. (AP PhotoAchmad Ibrahim)

Hot lava flows from the crater of Mount Semeru as its activity continues in this photo taken with slow shutter speed in Lumajang, East Java, Indonesia, late Sunday, Jan. 17, 2021. The highest volcano on Indonesia's most densely populated island of Java, spewed hot clouds as far away as 4.5 kilometers (nearly 3 miles) on Saturday. There were no immediate evacuations, but the National Disaster Mitigation Agency warned people who live in the villages on the slopes of the 3,676-meter (12,060-foot)-high mountain to be vigilant in looking for signs of danger. (AP PhotoHendra Permana)

Hot lava flows from the crater of Mount Semeru as its activity continues in this photo taken with slow shutter speed in Lumajang, East Java, Indonesia, late Sunday, Jan. 17, 2021. The highest volcano on Indonesia's most densely populated island of Java, spewed hot clouds as far away as 4.5 kilometers (nearly 3 miles) on Saturday. There were no immediate evacuations, but the National Disaster Mitigation Agency warned people who live in the villages on the slopes of the 3,676-meter (12,060-foot)-high mountain to be vigilant in looking for signs of danger. (AP PhotoHendra Permana)

People use a makeshift raft to cross through a flooded village in Banjar, South Kalimantan on Borneo Island, Indonesia, in this Saturday, Jan. 16, 2021 photo. Many thousands of people have been evacuated and a number have been killed in recent days in flooding on Indonesia's Borneo island, officials said Sunday. (AP PhotoPutra)

People use a makeshift raft to cross through a flooded village in Banjar, South Kalimantan on Borneo Island, Indonesia, in this Saturday, Jan. 16, 2021 photo. Many thousands of people have been evacuated and a number have been killed in recent days in flooding on Indonesia's Borneo island, officials said Sunday. (AP PhotoPutra)

Rescuers assist an elderly man to climb into their boat at a flooded village in Banjar, South Kalimantan on Borneo Island, Indonesia, in this Saturday, Jan. 16, 2021 photo. Many thousands of people have been evacuated and a number have been killed in recent days in flooding on Indonesia's Borneo island, officials said Sunday. (AP PhotoPutra)

Rescuers assist an elderly man to climb into their boat at a flooded village in Banjar, South Kalimantan on Borneo Island, Indonesia, in this Saturday, Jan. 16, 2021 photo. Many thousands of people have been evacuated and a number have been killed in recent days in flooding on Indonesia's Borneo island, officials said Sunday. (AP PhotoPutra)