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Mag. 3.3 quake - 12 km southwest of Tsukuba, Ibaraki, Japan, on Monday, Nov 27, 2023, at 11:18 pm (GMT +9) -

A light magnitude 3.3 earthquake hit 12.2 km (8 mi) away from Tsukuba, Ibaraki,  Japan, late in the evening of Monday, Nov 27, 2023 at 11.18 pm local time (GMT +9). The quake had a shallow depth of 68 km (42 mi) and was not felt (or at least not reported so).

Mag. 3.3 quake - 12 km southwest of Tsukuba, Ibaraki, Japan, on Monday, Nov 27, 2023, at 11:18 pm (GMT +9) Mag. 3.3 quake - 12 km southwest of Tsukuba, Ibaraki, Japan, on Monday, Nov 27, 2023, at 11:18 pm (GMT +9)

Weak magnitude 3.3 earthquake at 68 km depth

27 Nov 14:24 UTC: First to report: NIED after 6 minutes.

Earthquake details

Date & timeNov 27, 2023 14:18:11 UTC -
Local time at epicenterMonday, Nov 27, 2023, at 11:18 pm (GMT +9)
StatusConfirmed (manually revised)
Magnitude3.3
Depth67.6 km
Epicenter latitude / longitude36.105°N / 140.031°E Tsukuba-shi, Ibaraki, Japan
Seismic antipode36.105°S / 39.969°W
Shaking intensityVery weak shaking
Felt0 reports
Primary data sourceNIED (National Research Institute for Earth Science and Disaster Resilience)
Nearest volcanoNantai (87 km / 54 mi)
Weather at epicenter at time of quakeClear Sky 9.6°C (49 F), humidity: 59%, wind: 1 m/s (1 kts) from N
Estimated seismic energy released5.6 x 109 joules (1.56 megawatt hours, equivalent to 1.34 tons of TNT) | about seismic energy
Interactive map
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Nearby places

The closest larger town where the quake might have been felt is Ishige, a town with 25,000 inhabitants in Japan, in 5.9 km (3.7 mi) distance west of the epicenter. People likely experienced very weak shaking there. In the capital of  Japan, Tokyo, 55 km (34 mi) away from the epicenter, the earthquake could not be felt.
The following table shows some of the places that might have been affected (or not) by the shaking.
Distance Place Max. shaking intensity(*) Region Country
6 km (4 mi)
W of epicenter
Ishige
(pop: 24,900)
II: Very weak
Jōsō-shi, Ibaraki
11 km (7 mi)
SW of epicenter
Mitsukaidō
(pop: 41,100)
II: Very weak
Jōsō-shi, Ibaraki
12 km (8 mi)
NE of epicenter
Tsukuba
(pop: 175,600)
II: Very weak
Ibaraki
13 km (8 mi)
SW of epicenter
Iwai
(pop: 42,500)
II: Very weak
Bandō-shi, Ibaraki
14 km (8 mi)
SE of epicenter
Naka
(pop: 46,800)
II: Very weak
Tsuchiura-shi, Ibaraki
17 km (11 mi)
SE of epicenter
Ami
(pop: 48,300)
II: Very weak
Inashiki-gun, Ibaraki
18 km (11 mi)
SE of epicenter
Ushiku
(pop: 80,000)
II: Very weak
Ibaraki
19 km (12 mi)
N of epicenter
Makabe
(pop: 19,300)
II: Very weak
Sakuragawa-shi, Ibaraki
19 km (12 mi)
S of epicenter
Moriya
(pop: 56,600)
II: Very weak
Ibaraki
21 km (13 mi)
W of epicenter
Sakai
(pop: 26,900)
II: Very weak
Sashima-gun, Ibaraki
22 km (14 mi)
N of epicenter
Shimodate
(pop: 63,700)
II: Very weak
Chikusei-shi, Ibaraki
22 km (14 mi)
S of epicenter
Fujishiro
(pop: 33,100)
II: Very weak
Toride-shi, Ibaraki
23 km (14 mi)
SW of epicenter
Noda
(pop: 121,400)
II: Very weak
Chiba
23 km (14 mi)
NE of epicenter
Ishioka
(pop: 52,300)
II: Very weak
Ibaraki
23 km (14 mi)
S of epicenter
Torite
(pop: 80,700)
II: Very weak
Toride-shi, Ibaraki
25 km (16 mi)
NW of epicenter
Yūki
(pop: 51,600)
II: Very weak
Ibaraki
27 km (16 mi)
S of epicenter
Abiko
(pop: 131,800)
II: Very weak
Chiba
27 km (17 mi)
SE of epicenter
Ryūgasaki
(pop: 85,800)
II: Very weak
Ibaraki
27 km (17 mi)
S of epicenter
Kashiwa
(pop: 340,200)
II: Very weak
Chiba
28 km (17 mi)
W of epicenter
Satte
(pop: 55,300)
II: Very weak
Saitama
29 km (18 mi)
SW of epicenter
Kasukabe
(pop: 206,900)
II: Very weak
Saitama
29 km (18 mi)
SW of epicenter
Yoshikawa
(pop: 60,500)
II: Very weak
Saitama
30 km (18 mi)
W of epicenter
Koga
(pop: 58,000)
II: Very weak
Ibaraki
30 km (19 mi)
S of epicenter
Nagareyama
(pop: 156,000)
II: Very weak
Chiba
30 km (19 mi)
NW of epicenter
Oyama
(pop: 159,900)
II: Very weak
Tochigi
31 km (19 mi)
SE of epicenter
Inashiki
(pop: 47,000)
II: Very weak
Ibaraki
32 km (20 mi)
W of epicenter
Kukichūō
(pop: 73,400)
I: Not felt
Kuki-shi, Saitama
32 km (20 mi)
SW of epicenter
Koshigaya
(pop: 317,400)
I: Not felt
Saitama
34 km (21 mi)
SW of epicenter
Iwatsuki
(pop: 108,800)
I: Not felt
Saitama-shi, Saitama
36 km (22 mi)
SW of epicenter
Yashio
(pop: 81,300)
I: Not felt
Saitama
36 km (23 mi)
NE of epicenter
Tomobe
(pop: 37,100)
I: Not felt
Kasama-shi, Ibaraki
36 km (23 mi)
SW of epicenter
Sōka
(pop: 231,400)
I: Not felt
Saitama
38 km (24 mi)
S of epicenter
Matsudo
(pop: 470,300)
I: Not felt
Chiba
40 km (25 mi)
SW of epicenter
Saitama
(pop: 1,193,400)
I: Not felt
Saitama
40 km (25 mi)
W of epicenter
Ageo
(pop: 219,400)
I: Not felt
Saitama
43 km (27 mi)
SW of epicenter
Yono
(pop: 1,077,700)
I: Not felt
Saitama-shi, Saitama
44 km (27 mi)
SE of epicenter
Нарита
(pop: 100,600)
I: Not felt
Narita, Chiba
44 km (27 mi)
SW of epicenter
Kawaguchi
(pop: 468,600)
I: Not felt
Saitama
46 km (29 mi)
NE of epicenter
Mito
(pop: 246,500)
I: Not felt
Ibaraki
55 km (34 mi)
SW of epicenter
Tokyo
(pop: 8,336,600)
I: Not felt
Tokyo
Notes:
(*) Shaking intensity according to the Modified Mercalli Intensity Scale (MMI) and estimated using seismic models.

User-reports for this quake

There are no user reports for this quake yet.

If you felt it, be the first to report it!
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake.

Compare Quake Data

Data for the same earthquake as reported by different agencies

The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
Mag Depth Time GMT
2023-11-27
Epicenter Agency
3.3 68 km
42 mi
14:18:11 Japan: SW IBARAKI PREF NIED (National Research Institute for Earth Science and Disaster Resilience)

Seismograms

Seismic station: Ibaraki Yasato (JYT/JP network) | Distance from quake: 20 km / 12 mi | Show on map | Station Info
Seismic station Ibaraki Yasato: vertical movement plot around time of quake (source: IRIS/BUD)
Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Bandpass filter applied: 0.5-10.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool
Show more

Earthquake statistics

Average number of earthquakes

Based on data from the past 10 years and our earthquake archive back to 1900, there are about 7,000 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):
  • Mag. 7 or higher: 0.02 quakes per year (or 1 quake every 50 years)
  • Mag. 6 or higher: 0.32 quakes per year (or 1 quake every 3.1 years)
  • Mag. 5 or higher: 5.3 quakes per year
  • Mag. 4 or higher: 38.3 quakes per year
  • Mag. 3 or higher: 172 quakes per year (or 14.4 quakes per month)
  • Mag. 2 or higher: 464 quakes per year (or 38.7 quakes per month)
  • Mag. 1 or higher: 619 quakes per year (or 52 quakes per month)
The area where this quake occurred has a very high level of seismic activity. It has had at least 2 quakes above magnitude 7 since 1900, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 60 to 65 years.

Number of quakes per year

Previous quakes in the same area of this earthquake

Map of earlier quakes in the area of this quake

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Map to embed or share

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