Strong mag. 6.3 earthquake - Halmahera, Indonesia, on Thursday, 9 April 1987 at 00:48 (GMT)

Strong mag. 6.3 earthquake  - Halmahera, Indonesia, on Thursday, 9 April 1987 at 00:48 (GMT)

Strong magnitude 6.3 earthquake at 45 km depth

Date & time: 9 Apr 1987 12:48:55 UTC###AGESTRINGCOPY###
Magnitude: 6.3
Depth: 45.0 km
Epicenter latitude / longitude: 1.242°N / 128.432°E (Indonesia)
Nearest volcano: Dukono (78 km / 48 mi)
Nearby towns and cities:
72 km (45 mi) SE of Tobelo (Kabupaten Halmahera Utara, Maluku Utara) (pop: 10,000)
112 km (70 mi) ENE of Sofifi (Kota Tidore Kepulauan, North Maluku) (pop: 36,200)
127 km (79 mi) ENE of Ternate (North Maluku) (pop: 101,700)
361 km (225 mi) E of Bitung (pop: 137,400)
393 km (244 mi) NW of Sorong (West Papua) (pop: 125,500)
399 km (248 mi) E of Manado (North Sulawesi) (pop: 451,900)
720 km (447 mi) SSE of Davao City (Philippines) (pop: 1,212,500)
2536 km (1576 mi) ENE of Jakarta (pop: 8,540,100)
Primary data source: USGS
Estimated released energy: 1.8 x 1014 joules (49.4 gigawatt hours, equivalent to 42502 tons of TNT or 2.7 atomic bombs!) More info
[smaller] [bigger]
If you felt this quake (or if you were near the epicenter), please share your experience and submit a short "I felt it" report! Other users would love to hear about it!
Also if you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable also to earthquake science and earthquake hazard analysis and mitigation efforts. You can use your device location or the map to indicate where you were during the earthquake. Thank you!

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.
M 6.345 kmHalmahera, IndonesiaUSGS
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake yet. If you felt it be the first to report it!
Volcanoes & Earthquakes - new app for Android

Aftershocks of the 6.3 quake Halmahera, Indonesia, 9 April 00:48 UTC

More info
Recorded aftershocks, latest first (3 quakes):
  • 14 Apr 1987 22:33 UTC
    | M 5.1 |
    33 km (20.5 mi) depth
    27 km (17 mi) distance
    | USGS | Details
  • 11 Apr 1987 19:02 UTC
    | M 5.6 |
    33 km (20.5 mi) depth
    24 km (15 mi) distance
    | USGS | Details
  • 11 Apr 1987 18:53 UTC
    | M 5.1 |
    48 km (29.8 mi) depth
    24 km (15 mi) distance
    | USGS | Details

Earlier earthquakes in the same area

Strong mag. 6.3 earthquake - Halmahera, Indonesia, on Thursday, 9 April 1987 at 00:48 (GMT)
Volcanoes & Earthquakes - new app for Android

More on VolcanoDiscovery

Why is there advertising on this site?

Support us!

Maintaining the website and our free apps is a time- and cost-intensive effort.
If you find the information useful and would like to support our team to develop further features and get the upgraded ad-free version, consider making a donation (PayPal or Online cc payment).
Planned features:
  • Weather reports
  • Tsunami alerts
  • Design upgrades
Thanks to your past donations, these features have been added recently:
  • Earthquake archive back to 1900
  • Additional data sources
Download and Upgrade the Volcanoes & Earthquakes app to get one of the fastest seismic and volcano alerts online:
Android | IOS
Thank you!
Copyrights: VolcanoDiscovery and other sources as noted.
Use of material: Most texts and images, in particular photographs, on this website are protected by copyright. Further reproduction and use of without authorization is usually not consented. If you are not sure or need licensing rights for photographs, for example for publications and commercial use, please contact us.