RSS feed source: US National Weather Service

Tue, 9 Sep 2025, 00:10 | BY: EARTHQUAKEMONITOR

An intermediate magnitude 4.0 earthquake was reported in the morning near Kisarazu, Kisarazu Shi, Chiba, Japan.
According to the European-Mediterranean Seismological Centre (EMSC), the quake hit on Tuesday, September 9th, 2025, at 8:53 am local time at an intermediate depth of 70. km. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
Our monitoring service identified a second report from Japan’s National Research Institute for Earth Science and Disaster Resilience (NIED) which listed the quake at magnitude 4.3. A third agency, the citizen-seismograph network of RaspberryShake, reported the same quake at magnitude 4.0.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Sodegaura (pop. 64,900) located 2 km from the epicenter, Kisarazu (pop. 136,200) 6 km away, Kimitsu (pop. 83,100) 13 km away, Ichihara (pop. 283,500) 15 km away, Chiba (pop. 979,800) 25 km away, Mobara (pop. 88,300) 27 km away, Urayasu (pop. 171,400) 30 km away, Narashino (pop. 176,200) 32 km away, Yokohama (pop. 3,761,600) 32 km away, and Tokyo (pop. 8,336,600) 43 km away.

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RSS feed source: US National Weather Service

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RSS feed source: US National Weather Service

Date and TimeMag
DepthDistanceLocationDetailsMap Sep 5, 09:00 pm (GMT +9)

4.5

69 km97 km (60 mi) to the NW 5 km NE of Hanyū, Japan  I FELT IT – 69 reportsInfoAug 1, 10:58 pm (GMT +9)

4.1

100 km100 km (62 mi) to the NW Gunma, 35 km northwest of Saitama, Saitama, Japan 9 reportsInfoJul 30, 03:58 am (GMT +9)

4.0

49 km85 km (53 mi) to the N Japan: SW Ibaraki Pref 2 reportsInfoJun 20, 09:46 am (GMT +9)

4.2

60 km81 km (50 mi) to the SE Near East Coast of Honshu, Japan InfoJun 20, 09:45 am (GMT +9)

4.1

70 km87 km (54 mi) to the SE Japan: SE Off Boso Peninsula InfoJun 13, 03:18 pm (GMT +9)

4.5

66 km29 km (18 mi) to the NE 4 km SSE of Yotsukaidō, Japan 38 reportsInfoMay 4, 12:35 pm (GMT +9)

4.4

87 km33 km (20 mi) to the NW 11 km south of Tokyo, Tokyo, Japan 49 reportsInfoApr 21, 10:11 pm (GMT +9)

4.5

120 km71 km (44 mi) to the N 3 km north of Kasukabe, Saitama, Japan 13 reportsInfoApr 20, 03:11 pm (GMT +9)

4.5

88 km4.1 km (2.6 mi) to the N 8 km NE of Kisarazu, Japan 31 reportsInfoMay 26, 2023 07:03 pm (GMT +9)

6.1

42 km50 km (31 mi) to the E North Pacific Ocean, 15 km east of Togane, Chiba, Japan 259 reportsInfoMar 16, 2022 11:36 pm (GMT +9)

7.3

41 km293 km (182 mi) to the NE 57 km ENE of Namie, Japan 101 reportsInfoOct 7, 2021 10:41 pm (GMT +9)

5.9

63 km16 km (10.2 mi) to the NE Near East Coast of Honshu, Japan 326 reportsInfoFeb 13, 2021 11:07 pm

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