Bencana · Ogasawara earthquakeOgasawara Islands earthquake: Preliminary magnitude 7.0, no tsunami warningDitulis 26 Oktober 2026 pukul 12.53 UTCTontonTranskrip0:07An earthquake shook the Ogasawara Islands from four hundred and seventy kilometers0:10underground.0:11Its preliminary magnitude is seven point zero, with shaking measured on Chichujima0:15and Hahajima.0:16The Japan Meteorological Agency said there was no tsunami concern, and no tsunami0:20warnings were issued.0:21What the shaking did to island residents and essential services is still unclear.0:26The earthquake struck west of the Ogasawara Archipelago with its preliminary0:30epicenter offshore.0:31Its estimated depth was approximately four hundred and seventy kilometers.0:34The readings from Chichijima and Hahajima describe the shaking that reached those0:38islands from that deep underground source.0:40The earthquake began at eleven nine Sunday morning, October25,2026 , Japan0:46Time.0:47That origin time marks when the earthquake started.0:49Instruments detected its waves later.0:51The automated system then produced estimates that changed substantially.0:54The magnitude and depth in the event summary are still preliminary.0:58Magnitude seven point zero describes the earthquake size.1:01On Chichijima, Mikazukiyama recorded intensity three, while Nishimachi recorded1:05intensity two.1:06Hajima also recorded intensity three.1:09Each intensity reading describes ground motion at that station.1:12Two stations on the same island registered different intensities.1:15That's why the magnitude alone can't tell residents how strongly their particular1:18location shook.1:19Japan uses ten intensity categories.1:21They run from zero to seven, with lower and upper categories at five and six.1:25The island readings were intensity three and intensity two.1:28Japan switched to automatic instrumental intensity observations in April one1:32thousand nine hundred and ninety-six.1:34Before that, observers assessed shaking through what people felt and what happened1:37around them.1:38Today's readings come from instruments measuring motion at a particular site.1:42An intensity meter measures movement in three directions: two horizontal and one1:46vertical.1:47The calculation filters the signal for earthquake, wave periods, and combines those1:51movements.1:51It then uses an acceleration threshold exceeded for a total of zero point three1:55seconds to derive the published intensity category.1:57Those measurements give a precise account of ground motion where instruments sit.2:01Assessing injuries or the condition of buildings and essential services takes2:05information from the communities themselves.2:06An intensity reading can't supply that assessment.2:09Even when the earthquake's magnitude and depth are known, the earthquake began2:13before instruments logged its waves.2:15Detection came at about eleven ten, followed seven seconds later by the first2:19automated forecast.2:20That forecast estimated magnitude five point nine and a depth of ten kilometers.2:25The preliminary event summary superseded those first estimates with magnitude seven2:29point zero and a depth of approximately four hundred seventy kilometers.2:32Those entries track earthquake detection and early warning forecasts.2:36Tsunami warnings are issued separately.2:38The initial forecast shallow depth therefore shouldn't be carried forward as the2:41depth of this earthquake.2:43A separate calculation gives a moment magnitude of six point five and a centroid2:47depth of four hundred and ninety nine kilometers.2:50The centroid is the calculated center of seismic energy release.2:54It describes a different feature from the preliminary depth where the earthquake2:57began.2:58Japan uses both JMA magnitude and moment magnitude to describe earthquake size.3:03The agency lists seven point zero alongside the separate moment.3:06Magnitude calculation of six point five.3:09Reading those figures together as a downward revision would confuse two different3:12calculations.3:13The event summary continues to label its magnitude seven point zero as preliminary.3:17No tsunami warnings were issued, but serious destruction or casualties haven't been3:21confirmed either.3:22The measured island shaking is the clearest consequence so far.3:26Residents still lack a confirmed assessment of local damage and disruption to3:29essential services.3:31Local officials haven't provided a confirmed picture of injuries, damage, or service3:35disruption.3:35Emergency services haven't provided an event specific account of evacuations or3:39deployments.3:40The no tsunami assessment leaves those questions about the earthquake's effects on3:43land unresolved.Baca artikelKronologi ceritaHeyDexVideo singkat ↗Siapa melaporkan apaPoin yang hanya dilaporkan satu media9Hanya dilaporkan oleh XinhuaAn earthquake of magnitude 7.0 struck waters near Japan’s Ogasawara Islands on Sunday.25 Okt, 2.34 UTCHanya dilaporkan oleh The StarA preliminary magnitude 7.0 earthquake struck waters west of the Ogasawara Archipelago.25 Okt, 4.13 UTCThe Japan Meteorological Agency said there was no threat of a tsunami.25 Okt, 4.13 UTCNo tsunami warnings were issued for the earthquake.25 Okt, 4.13 UTCThe earthquake occurred at about 11:10 a.m. local time on Sunday, Oct. 25.25 Okt, 4.13 UTCThe earthquake was at a depth of about 470 km.25 Okt, 4.13 UTCThe earthquake registered seismic intensity 3 on Japan’s seven-level scale on Chichijima.25 Okt, 4.13 UTCThe earthquake registered seismic intensity 3 on Japan’s seven-level scale on Hahajima.25 Okt, 4.13 UTCThe reported epicentre was at 28.0 degrees north latitude and 139.9 degrees east…25 Okt, 4.13 UTCSetiap baris adalah klaim sebagaimana kami catat dari laporan media tersebut. Dibandingkan per 25 Oktober 2026 pukul 15.04 UTC.
