M5.6 earthquake 139 km ENE of Miyako, Japan
A magnitude 5.6 earthquake struck 139 km ENE of Miyako, Japan on Mon, Jul 24, 2017, 12:35 AM JST (15:35 UTC), 10 km (6 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.6 (Mww, W-phase moment), moderate
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2017-07-23 15:35:40 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 40.039° N, 143.488° E
- Region
- Japan
- Felt reports
- 3
- Strongest shaking
- III, weak shaking
- PAGER alert
- Green
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Magnitude estimates
Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.
| Mag. | Scale | Computed by | Notes |
|---|---|---|---|
| 5.6 | Mww, W-phase moment | USGS National Earthquake Information Center | Preferred · Reviewed · ±0.086 · 13 stations |
| 5.57 | Mw, moment | ISC-GEM global catalog | Final · ±0.1 |
| 5.6 | Mwb, body-wave moment | USGS National Earthquake Information Center | Moment tensor · Reviewed |
Shaking
The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.
- Strongest estimated
- III, weak shaking
- Peak ground acceleration
- 55.0% of gravity
- Peak ground velocity
- 0.8 cm/s
- Map
- Automatic
Did you feel it?
3 people reported to the USGS what they felt; the strongest reported shaking was V, moderate shaking.
Estimated impact
The USGS PAGER system estimates deaths and economic losses from the shaking and the population and buildings exposed to it.
- Alert level
- Green: little or no damage or loss of life expected
| Range | Chance |
|---|---|
| Under 1 | 65% |
| 1 to 10 | 30% |
| 10 to 100 | 4% |
| 100 to 1,000 | Under 1% |
| 1,000 to 10,000 | Under 1% |
| 10,000 to 100,000 | Under 1% |
| 100,000 to 10,000,000 | Under 1% |
| Range, million USD | Chance |
|---|---|
| Under 1 | 65% |
| 1 to 10 | 30% |
| 10 to 100 | 4% |
| 100 to 1,000 | Under 1% |
| 1,000 to 10,000 | Under 1% |
| 10,000 to 100,000 | Under 1% |
| 100,000 to 10,000,000 | Under 1% |
Fault motion and ground failure
How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.
- Faulting
- Reverse (thrust)
- Moment magnitude
- 5.6 Mww
- Nodal plane 1
- Strike 186°, dip 10°, rake 69°
- Nodal plane 2
- Strike 27°, dip 81°, rake 93°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 5.9 km horizontally, 1.8 km in depth
- Magnitude uncertainty
- ±0.09
- Depth from
- Operator assigned
- Station coverage gap
- 101°
- Stations used
- 88
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.6 and up: 4 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.5119 km ENE of Miyako, Japan · 3359 days ago · 10 km deep · 28 km away
- 4.3139 km ENE of Miyako, Japan · 3358 days ago · 10 km deep · 3 km away
- 4.9135 km E of Yamada, Japan · 3339 days ago · 10 km deep · 52 km away · felt by 2
- 4.7175 km ENE of Miyako, Japan · 3333 days ago · 10 km deep · 39 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000a02t (also filed as iscgem610792672). Read Sun, Oct 4, 2026, 10:27 PM UTC.