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Moderate mag. 5.9 earthquake - Java, Indonesia, on Friday, 21 May 2021 at 12:09 (GMT) - information

Moderate mag. 5.9 earthquake - Indian Ocean, 67 km south of Blitar, East Java, Indonesia, on 21 May 7:09 pm (GMT +7)

Moderate mag. 5.9 earthquake - Indian Ocean, 67 km south of Blitar, East Java, Indonesia, on 21 May 7:09 pm (GMT +7) Moderate mag. 5.9 earthquake - Indian Ocean, 67 km south of Blitar, East Java, Indonesia, on 21 May 7:09 pm (GMT +7)

Moderate magnitude 5.9 earthquake at 115 km depth

21 May 12:12 UTC: First to report: VolcanoDiscovery after 3 minutes.
21 May 12:15: Now using data updates from EMSC
21 May 12:25: Now using data updates from BMKG
21 May 12:30: Epicenter location corrected by 4 km (2.5 mi) towards SSW.
Update Fri, 21 May 2021, 15:00

Strong but deep earthquake shakes Java and Bali

Location of this afternoon's quake under Java and locations of users who felt it
Location of this afternoon's quake under Java and locations of users who felt it
A strong magnitude 5.9 quake occurred this afternoon at 9.09 pm local time under the sea about 50 km from East Java's southern coast. Thanks to its great depth of 115 km, it did not cause shaking strong enough at the surface to cause any significant damage, but it was widely felt across most parts of Java and neighboring Bali as a light vibration lasting a few seconds.
Some users who sent us their reports could even feel both and distinguish between the primary and secondary seismic waves arriving with 10-20 seconds time difference.
Earthquakes at intermediate depth (70-300 km) occur frequently occur beneath Java. Most are the result of intraplate faulting within the slab of the Australian plate that subducting (sinking) in northeasterly direction into the mantle underneath Java.
Update Fri, 21 May 2021, 12:21

Significant 6.3 quake hits near Blitar, East Java, Indonesia

6.3 quake 21 May 7:09 pm (GMT +7)
6.3 quake 21 May 7:09 pm (GMT +7)
Just 12 minutes ago, a 6.3-magnitude earthquake struck near Blitar, East Java, Indonesia. The tremor was recorded early evening on Friday 21 May 2021 at 7:09 pm local time, at an intermediate depth of 123 km below the surface.
The event was filed by the European-Mediterranean Seismological Centre (EMSC), the first seismological agency to report it.
Our monitoring service identified a second report from the German Research Centre for Geosciences (GFZ) which listed the quake at magnitude 5.7.
Based on the preliminary seismic data, the quake was probably felt by many people in the area of the epicenter. It should not have caused significant damage, other than objects falling from shelves, broken windows, etc.
In Sumberpucung (pop. 35,300) located 64 km from the epicenter, Kepanjen (pop. 51,900) 70 km away, Blitar (pop. 132,400) 72 km away, Kedungwaru (pop. 80,300) 87 km away, Tulungagung (pop. 65,300) 88 km away, Malang (pop. 746,700) 88 km away, Batu (pop. 75,600) 97 km away, and Singosari (pop. 57,800) 98 km away, the quake should have been felt as light shaking.
VolcanoDiscovery will automatically update magnitude and depth if these change and follow up if other significant news about the quake become available. If you're in the area, please send us your experience through our reporting mechanism, either online or via our mobile app. This will help us provide more first-hand updates to anyone around the globe who wants to know more about this quake.

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Earthquake details

Date & timeMay 21, 2021 12:09:23 UTC
Local time at epicenter21 May 7:09 pm (GMT +7)
StatusConfirmed
Magnitude5.9
Depth115.0 km
Epicenter latitude / longitude8.68°S / 112.31°E (Indian Ocean, Indonesia)
Antipode8.68°N / 67.69°W
Shaking intensityWeak shaking
Felt255 reports
Primary data sourceBMKG (Meteorological, Climatological, and Geophysical Agency of Indonesia)
Nearest volcanoBratan (45 km / 28 mi)
Nearby towns and cities61 km (38 mi) SSW of Sumberpucung (pop: 35,300) | Show on map | Quakes nearby
67 km (41 mi) SSE of Blitar (pop: 132,400) | Show on map | Quakes nearby
68 km (42 mi) SSW of Kepanjen (pop: 51,900) | Show on map | Quakes nearby
81 km (50 mi) SSE of Kedungwaru (pop: 80,300) | Show on map | Quakes nearby
82 km (51 mi) SE of Tulungagung (pop: 65,300) | Show on map | Quakes nearby
86 km (53 mi) SSW of Malang (pop: 746,700) | Show on map | Quakes nearby
93 km (58 mi) SSW of Batu (pop: 75,600) | Show on map | Quakes nearby
96 km (60 mi) SSW of Singosari (pop: 57,800) | Show on map | Quakes nearby
166 km (103 mi) SSW of Surabaya (pop: 2,374,700) | Show on map | Quakes nearby
662 km (411 mi) ESE of Jakarta (pop: 8,540,100) | Show on map | Quakes nearby
218 km (136 mi) SSW of Madura Island (pop: 3,622,000) | Show on map | Quakes nearby
286 km (178 mi) ESE of Java Island (pop: 141,370,000) | Show on map | Quakes nearby
298 km (185 mi) W of Bali Island (pop: 4,225,400) | Show on map | Quakes nearby
Weather at epicenter at time of quakeScattered Clouds 27.5°C (81 F), humidity: 80%, wind: 6 m/s (12 kts) from ESE
Estimated seismic energy released4.5 x 1013 joules (12.4 gigawatt hours, equivalent to 10676 tons of TNT or 0.7 atomic bombs!) | about seismic energy
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Data for the same earthquake reported by different agencies

Info: 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.DepthLocationSource
5.9115 kmJava, IndonesiaBMKG
5.7108 kmJava, IndonesiaGFZ
5.8114 kmIndonesia: Near SurabayaRENASS
5.7117 kmJAVA, INDONESIAEMSC
5.7108 km29 Km SSW of Sumberpucung, IndonesiaUSGS
5.8116 kmJava, IndonesiaGeoAu

User reports for this quake (266)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Surabaya / Weak shaking (MMI III) / horizontal (sideways) swinging / 15-20 s : Sluggish shaking for surprisingly long time on 4th floor of mall building. Did not recognize as earthquake in the beginning. | 4 users found this interesting.  
  • Duduk dilantai terasa kencang gempanya
Denpasar, Bali / Light shaking (MMI IV) / 20-30 s : Was a long, slow roll that kept on going. No peaks, just steady. | 4 users found this interesting.  
  • Yes same here in Canggu Bali / long and slow shaking
Munduk, Bali (306.1 km E of epicenter) [Map] / Very weak shaking (MMI II) / horizontal (sideways) swinging / very short : I actually felt this around 12:10 GMT, maybe pre-tremor | 3 users found this interesting.  
Singaraja / Weak shaking (MMI III) / horizontal (sideways) swinging / very short : It was rather strong but only for a short moment | 3 users found this interesting.  
Genteng, Banyuwangi (204.5 km E of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 30-60 s : Steel Pole Nearby Rattling for around 30 seconds, felt by some people nearby, but some other didn't | 2 users found this interesting.  
Legian, Bali (319.4 km E of epicenter) [Map] / Moderate shaking (MMI V) / horizontal (sideways) swinging / 2-5 s : Terkejut | 2 users found this interesting. (reported through our app)  
Surakarta (206.3 km NW of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 5-10 s : I felt the earthquake, my towel moved | 2 users found this interesting. (reported through our app)  
Pererenan / Very weak shaking (MMI II) / 5-10 s : I felt that but hour is different - I experience that around 20:10 | 2 users found this interesting.  
Carat, Gempol, Pasuruan / Weak shaking (MMI III) / horizontal (sideways) swinging / 1-2 s : My desktop monitor sways horizontally maybe 1-2 seconds | 2 users found this interesting.  
Genteng banguwangi (210.6 km E of epicenter) [Map] / Light shaking (MMI IV) / 10-15 s : About 15 seconds of light rattling | 2 users found this interesting. (reported through our app)  
Sleman / Weak shaking (MMI III) : Floor moving house lamps shaking | 2 users found this interesting.  
near Munduk, Bali (298.8 km E of epicenter) [Map] / Very weak shaking (MMI II) / 2-5 s : Felt like a big truck passing by for a few seconds | One user found this interesting.  
Kepanjen, East Java (68.8 km NNE of epicenter) [Map] / Strong shaking (MMI VI) / single lateral shake / 5-10 s : Goyangan kuat benda benda dalam rumah goyang | One user found this interesting. (reported through our app)  
Legian, Bali (311.7 km E of epicenter) [Map] / not felt : Feel nothing | One user found this interesting.  
Canggu (312.1 km E of epicenter) [Map] / Very weak shaking (MMI II) / single lateral shake / 5-10 s : Slow and lateral shak | One user found this interesting.  
Kresek, West Java (719.8 km WNW of epicenter) [Map] / not felt : Tidak Terasah | One user found this interesting. (reported through our app)  
Renon, Denpasar selatan, Bali (322.7 km E of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 5-10 s : We are lying in bed and this was shaking | One user found this interesting.  
Blitar, East Java (66.8 km NNW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s : just weak shaking | One user found this interesting. (reported through our app)  
Kota malang kecamatan karangploso (91.1 km NNE of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 2-5 s : the duration is very short its about 2 -3 seconds and felt so much strong from the shaking | One user found this interesting.  
Kota Denpasar East (316.5 km E of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 5-10 s : Multiple pre shake vibration | One user found this interesting.  
Gamping Lor, Yogyakarta (238.2 km WNW of epicenter) [Map] / Weak shaking (MMI III) : Steady shaking for quite awhile | One user found this interesting.  
  • Stay Safe Everyone!
Ubud penestanan (325.5 km E of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 2-5 s : Bed shook a few seconds | One user found this interesting.  
Legian, Bali (308.4 km E of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 1-2 s : it was two short moves. | One user found this interesting.  
Ubud (326.5 km E of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 30-60 s : Long shaking | One user found this interesting.  
near Amlapura, Karangasem Regency, Bali (369.7 km E of epicenter) [Map] / Very weak shaking (MMI II) / horizontal (sideways) swinging / 1-2 s : Short side to side motion not much movement. On 3rd story of hotel.Amed Beach, Bali | One user found this interesting.  
near Amlapura, Karangasem Regency, Bali (367.9 km E of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 30-60 s : Stronger sideways movement for about 30 seconds, then weaker for about 20 seconds. | One user found this interesting.  
Labuan Lombok (473.7 km E of epicenter) [Map] / not felt : Felt nothing | One user found this interesting. (reported through our app)  
Mataram-Lombok, ID.17.Lombok (undefined), West Nusa Tenggara (416.2 km E of epicenter) [Map] / Weak shaking (MMI III) / single lateral shake / 2-5 s : Lumayan bikin kaget | One user found this interesting. (reported through our app)  
Ubud, Kabupaten Gianyar, Bali (325.4 km E of epicenter) [Map] / Very weak shaking (MMI II) / horizontal (sideways) swinging / 5-10 s : Could see the water on containers moving sideways | One user found this interesting.  
Kasihan, Yogyakarta (238.9 km WNW of epicenter) [Map] / Light shaking (MMI IV) / 10-15 s : Sampe jogja kerasa | One user found this interesting. (reported through our app)  
surabaya (164.7 km NNE of epicenter) [Map] / Light shaking (MMI IV) : in the 18th floor , the light was shaking | One user found this interesting.  
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Aftershocks

[More info]

Recorded aftershocks, latest first (9 quakes)

Date and timeMag
Depth
LocationDetails
Jul 13, 2021 14:52
1 year 21 weeks ago
3.5

85 km
Indian Ocean, 71 km S of Blitar, East Java, IndonesiaMore
Jul 10, 2021 06:04
1 year 22 weeks ago
3.9

124 km
Indian Ocean, 40 km S of Blitar, East Java, IndonesiaMore
Jul 5, 2021 16:01
1 year 23 weeks ago - felt
4.0

30 km
Indian Ocean, 95 km S of Blitar, East Java, IndonesiaMore
Jun 23, 2021 07:06
1 year 24 weeks ago
3.5

126 km
34 km SE of Blitar, East Java, IndonesiaMore
Jun 7, 2021 17:28
1 year 27 weeks ago - felt
4.5

85 km
Indian Ocean, 65 km S of Blitar, East Java, IndonesiaMore
May 29, 2021 00:12
1 year 28 weeks ago
3.9

38 km
Indian Ocean, 95 km S of Blitar, East Java, IndonesiaMore
May 21, 2021 13:15
1 year 29 weeks ago
3.1

31 km
Indian Ocean, 87 km S of Blitar, East Java, IndonesiaMore
May 21, 2021 12:40
1 year 29 weeks ago
2.9

13 km
Indian Ocean, 83 km S of Blitar, East Java, IndonesiaMore
May 21, 2021 12:31
1 year 29 weeks ago - felt
3.1

79 km
Indian Ocean, 74 km S of Blitar, East Java, IndonesiaMore

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