Un magnitude 6.0 earthquake shook the coast of Fukushima early Sunday morning, at 00:21 local time, with epicenter offshore at 56 km east of Tomioka and a spotlight located at 46,8 km deep, according to the United States Geological Survey (USGS).
La Japan Meteorological Agency (JMA) discarded the tsunami hazard and called for caution due to possible replicasThe authorities have not reported any casualties or significant damage, although they have been activated emergency protocols in various prefectures.
Location, parameters and extent of the tremor
Instrumental analysis placed the hypocenter at the coordinates 37.387°N and 141.653°EThe cities closest to the epicenter were Tomioka (56,7 km), Namie (58,8 km), Minami-Sōma (65,4 km), Iwaki (77,9 km) and the city of Fukushima (112,3 km), where the tremor was felt more clearly than in more distant areas.
The shaking was widely felt in northeastern Honshu and also in the metropolitan area of Tokyo, with stories of swinging mild to moderate, vibration of windows and hanging objects, and a more intense perception near the Fukushima coast.
Official assessment and state of infrastructure
Initial reports indicate that the power grid and communications remained operational, and that the nuclear power plants from the area did not register incidencesTechnical teams continue to review sensitive facilities such as bridges and viaducts.
As a precaution, they were carried out inspections and some transport lines applied temporary service stops or adjustments within the usual protocols that are activated in Japan after an earthquake of this magnitude.
Why Japan records so many earthquakes
The archipelago sits on the Pacific Ring of Fire, where several interact tectonic plates (Pacific, Philippine, Okhotsk and Eurasian), a scenario that explains the high frequency of earthquakes throughout the year.
Although tremors are part of everyday life, the anti-seismic regulations and the consolidated one culture of prevention have significantly reduced the risk of collapses in moderate magnitude events such as the one recorded off Fukushima.
The memory of 2011 and the lessons learned
Fukushima prefecture was scarred by the earthquake of magnitude 9.0 of March 11, 2011, which triggered a tsunami devastating with almost 18.500 people dead and missing, and a very serious crisis at the power plant Fukushima Daiichi.
Following that disaster, more than 165.000 people were evacuated and infrastructure, protocols and drills were reinforced, measures that today help to respond more quickly and in a coordinated manner to new seismic events.
Technical data reported by USGS and JMA
The monitoring agencies disseminated the main parameters of the event and the status of the alerts, keeping a close monitoring of the affected area and the possible swarm of replicas.
- Local time: 00:21 Sunday (JST); magnitude 6.0.
- Epicenter: sea in front of Fukushima, a 56 km E of Tomioka; depth 46,8 km.
- Coordinates: 37.387°N, 141.653°E; Event ID: us6000resn.
- Readings analyzed: 133horizontal uncertainty 6,4 km and vertical 6,3 km; maximum azimuthal gap 49°; nearest station to 320,7 km.
- JMA: no tsunami warning; recommendations for monitoring subsequent activity.
Citizen reporting platforms collected more than 200 notifications with georeferenced position, and the perceived intensity ranged from weak to moderate according to the Modified Mercalli Scale (MMI), with a greater sense of movement along the northeastern coast.
Recommendations and citizen preparation
Civil Protection and the city councils insisted on keep calm, check for possible damage to the home, secure objects that could fall and follow only the official information against possible aftershocks.
In educational centers and companies they were reviewed evacuation procedures and meeting points, common practices that contribute to respond quickly when tremors are recorded.
With no serious damage or confirmed casualties, the magnitude 6.0 earthquake The Fukushima disaster once again puts the country's preparedness to the test and reminds us of the importance of don't let your guard down in one of the most seismically active regions on the planet.
