Very strong mag. 6.4 earthquake - 126 km northwest of Ternate, North Maluku, Indonesia, on Monday, July 23, 1984 at 16:03 GMT
Quake Data | Interactive map | User Reports | Aftershocks | Earlier quakes here | Quakes in Indonesia | North Maluku | North Sulawesi | Gorontalo

Very strong magnitude 6.4 earthquake at 26 km depth
1 Jan 00:00 UTC: First to report: USGS after 30 seconds.
Magnitude: 6.4
Depth: 25.9 km
Epicenter latitude / longitude: 1.384°N / 126.419°E

Antipode: 1.384°S / 53.581°W
Nearest volcano: Hiri (114 km / 71 mi)
Nearby towns and cities:
126 km (78 mi) WNW of Ternate (pop: 101,700) --> See nearby quakes!
137 km (85 mi) E of Bitung (pop: 137,400) --> See nearby quakes!
146 km (91 mi) WNW of Sofifi (Kota Tidore Kepulauan) (pop: 36,200) --> See nearby quakes!
161 km (100 mi) E of Laikit, Laikit II (Dimembe) (Kabupaten Minahasa Utara) (pop: 8,000) --> See nearby quakes!
168 km (104 mi) E of Tondano (Kabupaten Minahasa) (pop: 33,300) --> See nearby quakes!
175 km (109 mi) E of Manado (pop: 451,900) --> See nearby quakes!
180 km (112 mi) E of Tomohon (pop: 27,600) --> See nearby quakes!
181 km (112 mi) WSW of Tobelo (Kabupaten Halmahera Utara) (pop: 10,000) --> See nearby quakes!
385 km (239 mi) ENE of Gorontalo (pop: 144,200) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 2.5 x 1014 joules (69.8 gigawatt hours, equivalent to 60036 tons of TNT or 3.8 atomic bombs!) | about seismic energy
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. | Depth | Location | Source |
6.4 | 26 km | Molucca Sea (Indonesia) | USGS |
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Aftershocks
[More info]
Recorded aftershocks, latest first (18 quakes)
Date and time![]() | Mag Depth | Location | Details |
Jan 5, 1985 18:22 37 years ago | 5.0 33 km | 105 km NW of Ternate, North Maluku, Indonesia | More |
Jan 1, 1985 17:57 37 years ago | 5.1 66 km | 88 km W of Ternate, North Maluku, Indonesia | More |
Nov 23, 1984 09:28 38 years ago | 4.9 33 km | 116 km SE of Bitung, North Sulawesi, Indonesia | More |
Nov 8, 1984 15:33 38 years ago | 4.8 91 km | 120 km W of Ternate, North Maluku, Indonesia | More |
Oct 28, 1984 06:43 38 years ago | 4.4 51 km | 152 km NW of Ternate, North Maluku, Indonesia | More |
Oct 28, 1984 06:04 38 years ago | 4.6 39 km | 131 km NW of Ternate, North Maluku, Indonesia | More |
Oct 26, 1984 09:12 38 years ago | 5.3 53 km | 115 km E of Bitung, North Sulawesi, Indonesia | More |
Oct 26, 1984 08:49 38 years ago | 6.3 56 km | 124 km E of Bitung, North Sulawesi, Indonesia | More |
Oct 19, 1984 17:45 38 years ago | 5.8 76 km | 58 km E of Bitung, North Sulawesi, Indonesia | More |
Oct 9, 1984 02:08 38 years ago | 4.8 77 km | 138 km NW of Ternate, North Maluku, Indonesia | More |
Aug 3, 1984 00:54 38 years ago | 5.1 59 km | 112 km SE of Bitung, North Sulawesi, Indonesia | More |
Jul 26, 1984 00:00 38 years ago | 4.8 33 km | 96 km E of Bitung, North Sulawesi, Indonesia | More |
Jul 25, 1984 20:10 38 years ago | 4.7 33 km | 120 km W of Ternate, North Maluku, Indonesia | More |
Jul 25, 1984 19:34 38 years ago | 5.9 44 km | 105 km NW of Ternate, North Maluku, Indonesia | More |
Jul 25, 1984 17:23 38 years ago | 5.4 34 km | 116 km NW of Ternate, North Maluku, Indonesia | More |
Jul 25, 1984 17:21 38 years ago | 4.9 33 km | 118 km NW of Ternate, North Maluku, Indonesia | More |
Jul 25, 1984 17:14 38 years ago | 5.0 33 km | 119 km NW of Ternate, North Maluku, Indonesia | More |
Jul 23, 1984 17:14 38 years ago | 4.9 63 km | 121 km E of Bitung, North Sulawesi, Indonesia | More |
Earlier earthquakes in the same area
Click here to search our database for earlier earthquakes in the same area since 1900!