User:Quake1234/sandbox4
 | This article documents a current event. Information may change rapidly as the event progresses, and initial news reports may be unreliable. The latest updates to this article may not reflect the most current information. (June 2024) |
| UTC time | 2024-06-22 16:18:46 |
|---|---|
| 2024-07-04 05:08:06 | |
| Local date | 23 June 2024 |
| 4 July 2024 | |
| Local time | 02:18 PGT |
| 15:08 PGT | |
| Magnitude | 5.7 Ms 5.5 Mw |
| 6.3 Ms 6.0 Mw | |
| Depth | 20 km (12 mi) |
| Epicenter | 5°54′29″S 146°29′24″E / 5.908°S 146.490°E |
| Type | Reverse |
| Areas affected | New Guinea Prefecture, Papua |
| Total damage | 45 buildings destroyed; 1,839 buildings damaged |
| Max. intensity | MMI VIII (Severe) |
| Aftershocks | Several Largest is Ms 5.5 (Mw 5.2) |
| Casualties | 5 fatalities, 251 injuries
|
On 23 June 2024, at 02:18:46 PGT (16:18 UTC on 22 June), a Ms 5.7 earthquake struck Madang Province, Papua, 1 km (0.62 mi) southeast of Gumbaion.[1] On 4 July, a Ms 6.3 mainshock hit the exact same area.[2]
Tectonic setting
The primary tectonic feature of the 1,200 km (750 mi) island chain is the New Hebrides Subduction Zone, the convergent boundary of the Indo-Australian and Pacific Plates. Along the Wadati–Benioff zone, earthquake activity has been observed as shallow, intermediate, and deep-focus events at depths of up to 700 km (430 mi). Volcanic activity is also present along this north-northwest trending and northeast-dipping oceanic trench.[3]
While much of the island arc experiences intermediate-depth earthquakes along a Wadati–Benioff zone that dips steeply at 70°, the area adjacent to the d'Entrecasteaux Ridge does not. There is a corresponding gap in seismicity that occurs below 50 km (31 mi) where it intrudes into the subduction zone from the west. According to the NUVEL-1 global relative plate motion model, convergence is occurring at roughly 8 cm (3.1 in) per year. The uncertainty, which also affects the Tonga arc, is due to the influence of spreading at the North Fiji Basin.[4]
Earthquake
Intensity
Intensity
|
Province | Location | Population exposure |
|---|---|---|---|
| VII | Madang | Gumbaion | 16k |
| VI | Madang | Bambu, Gwarawon, Teptep | 54k |
| V | Madang | Saidor, Warai, Somek, Malalamai | 2,147k |
| Morobe | Wantoat, Waritzian |
Intensity
|
Province | Location | Population exposure |
|---|---|---|---|
| VIII | Madang | Gumbaion | 16k |
| VII | Madang | Bambu, Gwarawon, Teptep | 54k |
| VI | Madang | Saidor, Warai, Somek, Malalamai | 1,734k |
| Morobe | Wantoat | ||
| V | Madang | Gusap, Mindiri | 3,356k |
| Morobe | Mutzing, Kaiapit, Wampar, Waritzian, Wasu, Ramu |
Impact
23 June
Ten people were injured, 28 houses collapsed and 567 others were damaged in Gumbaion, along with several churches.[5][6] In village of Tepmawon alone, five people were injured, one house collapsed and 191 others were damaged.[7] In Bambu, four people were injured, eight houses collapsed and 264 others were damaged;[8] the collapse of a two-story house in the town injured two occupants.[9] Three people were injured, three houses collapsed and 250 others were damaged in Gwarawon.[10]
In Saidor, 26 people were injured.[11] Thirteen schools were damaged in Somek, causing class suspensions.[12] Three landslides occurred in the Waritzian area of Morobe Province.[13] Fifteen buildings were slightly damaged in Kainantu, Highlands Province.[14]
4 July
In Gumbaion, 14 people were injured and 146 houses were damaged.[15] A stone torii gate and the walls of a temple collapsed there.[16] One person died after falling in panic, 41 others were injured and 20 houses were damaged in Bambu.[17][18] In Gwarawon, 80 people were injured and 150 houses sustained damage.[19]
In Teptep, four houses collapsed and 135 others were damaged, along with several bridges.[20][21] Three sections of the Huon Highway were blocked by rockfalls in the town.[22] Four people were killed by a landslide and 49 others were injured there.[23] At least 259 buildings, including two churches, were damaged in Saidor, where 23 people were injured.[24] A teenager was injured when a house collapsed and 20 buildings were damaged in Ramu, Morobe Province,[25] while another house collapsed in Wasu.[26]