Two Indonesian earthquakes: different depths, different initial tolls
Two strong earthquakes struck separate parts of Indonesia on the same day: Flores had deaths, injuries and evacuations, while a much deeper North Sumatra quake had no immediate serious damage reported. The accounts describe different depths and initial tolls.
Science··Midday
A heavy initial toll in Flores
The magnitude 7.7 earthquake north of Flores had killed at least 40 people and injured 50 by Saturday evening. The initial toll given by rescue official Fathur Rahman accompanied a shallow focus reported at about ten kilometres and conveyed the event’s heavy human impact. Shaking was felt in regencies across East Nusa Tenggara, West Nusa Tenggara and South Sulawesi. In Nagekeo, 2,000 people left their homes without waiting for an official evacuation order; that detail extended the immediate impact beyond deaths and injuries into daily life. BMKG deputy director Nelly Florida Riama said aftershocks were continuing and urged the public to remain alert. The agency lifted its tsunami warning after detecting no significant rise in sea level along the coasts. Work on land was continuing when the warning came down: injured people needed care, residents outside their homes needed shelter and safe areas remained important during the aftershocks. The Flores update therefore described a shallow focus, a heavy initial toll and simultaneous coastal and land responses within one event timeline.[1]
The initial picture in North Sumatra
A second strong earthquake struck North Sumatra on the same day at magnitude 6.9. The US Geological Survey placed the tremor north-northwest of Pematangsiantar at 10:54 GMT. Its focus lay far below the surface, forming a clear contrast with the focus near the surface in Flores. No casualties or significant damage had been reported when the article was published. That wording described conditions in the first hours and was not presented as a final toll. The epicentre lay thousands of kilometres from the Flores earthquake, in a separate part of the archipelago’s subduction system. The article placed the North Sumatra tremor in a geographically separate setting from the Flores event. The early update did not center on a casualty count, treatment of injured people or evacuation; it centered on the absence of serious damage in the reports available to officials. The North Sumatra account thus paired a very deep focus with a limited initial impact update.[2]
Same day, separate regions
The date was the same, but the event sites and the stages reached by the updates were different. The magnitudes differed too: 7.7 was reported for Flores and 6.9 for North Sumatra. By Saturday evening, Flores had at least 40 deaths, 50 injured people, 2,000 residents who had left home and continuing aftershocks. Although the tsunami warning for the coasts had been lifted, humanitarian needs on land remained. The first North Sumatra account, by contrast, contained no casualties or serious damage; its epicentre was near Pematangsiantar and far from Flores. The Flores focus was near the surface, while the North Sumatra focus was very deep. Those features appeared alongside different initial tolls in the reports. Their time labels also define the comparison: the Flores figures describe the picture on Saturday evening, while the North Sumatra information describes the early situation at publication time. The phrase “immediate” keeps that second toll explicitly open. A News placed the epicentres in separate parts of the archipelago’s subduction system, while both reports described the events as separate earthquakes. Together, the reports describe different focal depths, impact updates and response stages across two strong earthquakes on the same day.[1], [2]
