Turkey earthquakes

M5.2 earthquake 2 km NNE of Kar??yaka, Turkey

A magnitude 5.2 earthquake struck 2 km NNE of Kar??yaka, Turkey on Tue, Aug 31, 1999, 11:10 AM GMT+3 (08:10 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.9 4 km SE of Köseköy, Turkey. This one was a foreshock.

İzmit forecast More in Turkey

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 5.2 (Mwc, centroid moment), moderate
Magnitude from: USGS National Earthquake Information Center
Local time: Tue, Aug 31, 1999, 11:10 AM GMT+3
UTC: 1999-08-31 08:10:49 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 40.711° N, 29.949° E
Region: Turkey
Strongest shaking: VI, strong shaking
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
5.2	Mwc, centroid moment	USGS National Earthquake Information Center	Preferred · Reviewed
5.15	Mw, moment	ISC-GEM global catalog	Final · ±0.1
5.1	Mwc, centroid moment	Global CMT project	Preliminary

Deaths and damage

From NOAA NCEI’s Significant Earthquake Database (record 5530), matched to this event by time and place.

Deaths: 1
Injuries: 166
Damage: Limited (under about $1 million)

Where the literature gives no number, NCEI records a description on a scale of 1 to 4, printed here in its words. Damage is in millions of US dollars of the year of the event, not adjusted for inflation.

NOAA’s full record of this earthquake

What happened

The USGS’s account of the effects of this earthquake.

One person killed, 166 injured and additional damage in the Izmit area. Felt at Istanbul.

From the USGS event page for usp0009dv7. U.S. Geological Survey text and figures are in the public domain.

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated: VI, strong shaking
Peak ground acceleration: 16.6% of gravity
Peak ground velocity: 2.3 cm/s
Map: Automatic

USGS ShakeMap: estimated shaking intensity around the epicenter — Estimated shaking intensity. Map: USGS ShakeMap.

Did you feel it?

No one has reported feeling this quake to the USGS.

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Faulting: Strike-slip
Nodal plane 1: Strike 329°, dip 33°, rake -22°
Nodal plane 2: Strike 77°, dip 78°, rake -121°

How well it is located

Reviewed by a seismologist.

Depth from: OPERATOR_ASSIGNED

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 2.2 and up: 91 in the 60 days after this one and 87 in the 30 days before it.

After

The first 60 of 91.

Before

Earthquakes today Turkey earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0009dv7 (also filed as gcmtb083199a, gcmt19990831081049, atlas19990831081051, iscgem1655596). Read Sat, Oct 3, 2026, 3:42 AM UTC.