Georg Eberhard Rumphius was a German-born naturalist working for the Dutch East India Company on Ambon. He had arrived in 1654, drawn not by commerce but by the staggering biodiversity of the Spice Islands, and had spent two decades cataloging plants, shells, and minerals with obsessive precision. By 1670, glaucoma had taken his vision completely. He continued his work by dictating to assistants, including his wife Suzanna and his son Paul August, who also drew the botanical illustrations.

On the night of the earthquake, the walls of Ambon's buildings became instruments of death. Rumphius's wife and two of his daughters were crushed when a wall collapsed on them. They were among five Europeans killed. Seventy-nine Chinese residents also died in the building collapses, along with an unknown number of indigenous islanders whose deaths went unrecorded by colonial authorities. Blind, bereaved, and surrounded by destruction, Rumphius did what he had always done: he documented. His account of the earthquake and tsunami, written from the testimony of those who could still see, became the first detailed record of a tsunami in Indonesian history.

What struck the northern coast of Ambon Island that night was not an ordinary tsunami. On the Hitu peninsula, the waves were estimated to have reached heights of up to 100 meters - a figure so extreme that modern scientists initially questioned it. Recent research has offered an explanation: the earthquake, estimated at magnitude 6.8 at a depth of 40 kilometers, likely triggered a massive underwater landslide on the steep submarine slopes north of Ambon. The landslide, not the earthquake itself, generated the wave - which is why the devastation was concentrated on the northern shore while other parts of the island experienced only minor flooding.

The distinction matters. A tectonic tsunami spreads energy across a wide front. A landslide-generated tsunami concentrates its force locally, producing extreme run-up heights in a narrow zone. On the Hitu coast, this meant a wall of water that eyewitnesses described as dirty and foul-smelling - laden with sediment scoured from the seafloor. Entire forests were uprooted. Plantations vanished. Over 2,000 people died, though the true number will never be known.

Before the wave hit, the earthquake had already transformed the landscape. Rumphius's account describes water shooting upward from wells and fissures in the ground, some fountains reaching impressive heights. Blue clay and sand erupted alongside the water - material from deep geological layers forced to the surface by the violent shaking. Roads cracked. Homes that survived the initial collapse were split by ground deformation. The phenomenon, known today as liquefaction, turned solid earth into a treacherous fluid, swallowing foundations and buckling structures that had stood for decades.

The shaking was severe enough to be felt across the Maluku Islands, though the worst damage was concentrated on Ambon. Victoria Castle, the Dutch colonial fortification that served as the administrative heart of the Governorate of Ambon, survived but was badly damaged. For a colonial outpost at the edge of European reach, the earthquake was a reminder of how thin the veneer of control really was. Stone buildings could project authority; the earth could revoke it in seconds.

The earthquake that killed his family did not stop Georg Eberhard Rumphius. Blind and grieving, he returned to his life's work: the Herbarium Amboinense, a comprehensive catalog of the plants of the Moluccas that would eventually describe some 2,000 species. He dictated for another twenty-eight years. In 1687, a fire destroyed his library, his manuscripts, and the original illustrations. He started over from copies. In 1690, the completed manuscript was loaded onto a ship bound for the Netherlands. The French sank the ship. He started over again, from a retained copy.

The Dutch East India Company, which employed him, decided the Herbarium contained too much commercially sensitive information about spice cultivation and suppressed its publication. Rumphius died in 1702 on Ambon, still blind, never having seen his work in print. The Herbarium Amboinense was finally published in 1741, thirty-nine years after his death. It remains a foundational text in tropical botany. The man who lost his sight, his family, his manuscripts, and his hope of publication persisted anyway - because the plants of Ambon were worth recording whether anyone read the record or not.

Ambon Island sits in one of the most seismically active regions on Earth, at the collision zone of the Australian, Pacific, and Philippine Sea tectonic plates. The 1674 event was not the first earthquake to strike the Maluku Islands, nor would it be the last - an 1852 Banda Sea earthquake caused widespread destruction in the same region. But the 1674 megatsunami holds a singular place in the historical record: it was the first tsunami in Indonesia to be documented in detail, thanks to a blind naturalist who refused to stop writing.

Today, the BMKG and NOAA databases list the earthquake at magnitude 6.8. No modern seismograph recorded it; the magnitude is estimated from Rumphius's descriptions of damage and the wave's behavior. The 100-meter run-up height on the Hitu peninsula remains among the most extreme tsunami measurements in global history. For the people of Ambon, the lesson is written in the landscape: the steep submarine slopes that make the island beautiful also make it vulnerable. The next landslide-generated wave may come in a century or in a decade. The Banda Sea keeps its own schedule.