Earthquake with magnitude of Md 2.3 on date 20-08-1999 and time 13:07:02 (Italy) in region 3 km W Amatrice (RI)

A magnitude Md 2.3 earthquake occured in region: 3 km W Amatrice (RI), on

  • 20-08-1999 11:07:02 (UTC)
  • 20-08-1999 13:07:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.62, 13.26 at 10 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Amatrice RI 3 2657 2657
Cittareale RI 8 482 3139
Accumoli RI 8 667 3806
Montereale AQ 11 2581 6387
Campotosto AQ 12 542 6929
Capitignano AQ 12 665 7594
Borbona RI 16 617 8211
Arquata del Tronto AP 17 1178 9389
Posta RI 17 694 10083
Cagnano Amiterno AQ 18 1369 11452
Barete AQ 19 737 12189

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km NW of L'Aquila (69753 inhabitants)
37 Km W of Teramo (54892 inhabitants)
50 Km E of Terni (111501 inhabitants)
58 Km SE of Foligno (57155 inhabitants)
74 Km W of Montesilvano (53738 inhabitants)
80 Km W of Pescara (121014 inhabitants)
81 Km W of Chieti (51815 inhabitants)
82 Km NE of Guidonia Montecelio (88673 inhabitants)
82 Km NE of Tivoli (56533 inhabitants)
89 Km SE of Perugia (166134 inhabitants)
97 Km E of Viterbo (67173 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 1000 Md 2.3 1999-08-20
11:07:02
42.62 13.26 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 372349
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1999-08-20 11:07:02 ± 0.465
Latitude 42.62 ± 0.01
Longitude 13.26 ± 0.04
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 372349

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 3328.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 260
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.0021
Epicentral distance of station farthest from the epicenter (degree) 0.00599
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 372349
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 22:49:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.SNTG.Z. 1999-08-20T11:07:26.00 10.0 undecidable manual SG 339 0.006 0.01 0.7
--.ASS.Z. 1999-08-20T11:07:24.40 10.0 undecidable manual SG 314 0.0056 -0.03 0.7
--.MNS.Z. 1999-08-20T11:07:19.50 10.0 undecidable manual SG 240 0.0044 -0.55 0.4
--.ASS.Z. 1999-08-20T11:07:16.00 10.0 undecidable manual PG 314 0.0056 0.84 0.4
--.SNTG.Z. 1999-08-20T11:07:15.53 10.0 undecidable manual PG 339 0.006 -0.53 0.8
--.MNS.Z. 1999-08-20T11:07:12.74 10.0 undecidable manual PG 240 0.0044 0.1 2
--.NRCA.Z. 1999-08-20T11:07:12.00 10.0 undecidable manual SG 333 0.0021 0.04 0.8
--.NRCA.Z. 1999-08-20T11:07:08.00 10.0 undecidable manual PG 333 0.0021 0.04 2.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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