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LOCAL EARTHQUAKE HISTORY

Urayasu City earthquake and Shindo history

浦安市

Earthquakes for which stations associated with Urayasu City reported an actual Shindo observation.

Latest observation: Sep 22, 2026, 03:34 PM JST
LATEST LOCAL OBSERVATION

Latest earthquake observed in Urayasu City

震度1

Highest Shindo observed in Urayasu CitySource region: Southern Ibaraki PrefectureM3.9

Local seismic profile

Since Jan 10, 2015, stations associated with Urayasu City have reported a local reading for 495 earthquakes. Shindo 1 was most common, while the highest local level, Shindo 5−, was recorded 1 times.

Latest observationSep 22, 2026
Highest local Shindo5−
Observed events495Jan 10, 2015Sep 22, 2026
Associated observation stations2JMA
Latest observation: Sep 22, 2026

Recent observed earthquakes

Earthquakes for which stations associated with Urayasu City reported an actual Shindo observation.

2 Associated observation stations

Stations and strongest local observations

The map combines stations assigned to this place with earthquakes that produced its strongest local readings.

Open this place on the map
Associated observation stationsStations: JMA observation catalogue · basemap: OpenFreeMap
Jan 10, 2015 to Sep 22, 2026 · 41 records

Observation history

This history counts earthquakes observed at stations in the place, not earthquakes whose epicentre lies inside its boundary. Counts can change as stations are updated and older or corrected observations are added.

All years · Shindo 3+ · Clear filters
First observation: Jan 10, 2015

Observed events by year

Choose a year to update the event history and local Shindo distribution.

All years
All years

Shindo observed in this place

The highest reading from stations in this place, not the maximum Shindo of the whole event.

All Shindo
13202124341495−15+06−06+070
Reference model · not a forecast

Ground & J-SHIS

A change in the number of observations cannot by itself predict a larger earthquake.

Local seismic profile

Where the shaking usually comes from

Source regions of earthquakes observed here, ordered by the number of reports.

5−
Southern Ibaraki Prefecture茨城県南部
90
4
Northwestern Chiba Prefecture千葉県北西部
73
4
Off the Coast of Fukushima Prefecture福島県沖
51
3
Off the east Coast of Chiba Prefecture千葉県東方沖
40
2
Off the Coast of Ibaraki Prefecture茨城県沖
38
3
Northern Ibaraki Prefecture茨城県北部
30
Local seismic profile

Recent observations in long-term context

Latest calendar year302026
Average completed year42.311
Shindo 3 or higher51Shindo ≥ 3

A change in the number of observations cannot by itself predict a larger earthquake.

Reference model · not a forecast J-SHIS (NIED) · 250 m · 5339377324

Ground conditions near an observation station

J-SHIS data for the 250 m mesh containing 浦安市日の出.

J-SHIS / NIED

How to read these values

Landform classFilled land埋立地

A landform class assigned to the whole 250 m mesh and used to estimate AVS30. The name alone does not determine safety, and it is model data rather than a borehole survey at the station.

AVS30147.3 m/s

The average speed of an S-wave through the upper 30 metres. A lower value generally indicates softer material that can amplify shaking more. J-SHIS uses this value to estimate the amplification shown to the right. It is not predicted Shindo.

Surface velocity amplification×2.34

For the same incoming wave, local ground conditions may make peak-motion velocity at the surface about 134% higher than at engineering bedrock (Vs = 400 m/s). This value describes motion velocity—it does not multiply magnitude or forecast ground acceleration.

Ground conditions can change over short distances. These values do not rate the whole place or the safety of a building, and they cannot predict an earthquake. Source: J-SHIS (NIED), V4 model; processed for presentation by JISHINDESU.

Reference model · not a forecast J-SHIS (NIED) · A12227

Earthquake scenarios affecting this place

Official J-SHIS models ranked for their potential impact on this municipality.

J-SHIS / NIED

#1 means the model ranks highest in the J-SHIS result for this place under the same settings. It is not a ranking of which earthquake will happen next.

Magnitude on a card describes the size of the whole earthquake model, not the Shindo expected here. Local shaking also depends on distance, depth and ground conditions.

J-SHIS 2020 model, 30-year period and Shindo 6-lower threshold. This is not a prediction of a particular earthquake. Source: J-SHIS (NIED); processed for presentation by JISHINDESU.

Local seismic profile

Nearby places

Municipalities nearest to the representative station position.