Earthquake with magnitude of Md 2.5 on date 12-05-1999 and time 00:12:20 (Italy) in region 6 km E L'Aquila (AQ)

A magnitude Md 2.5 earthquake occured in region: 6 km E L'Aquila (AQ), on

  • 11-05-1999 22:12:20 (UTC)
  • 12-05-1999 00:12:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.37, 13.47 at 11 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
L'Aquila AQ 6 69753 69753
Poggio Picenze AQ 8 1136 70889
Fossa AQ 8 721 71610
Ocre AQ 9 1167 72777
Sant'Eusanio Forconese AQ 10 394 73171
Barisciano AQ 11 1828 74999
San Demetrio ne' Vestini AQ 11 1854 76853
Villa Sant'Angelo AQ 12 424 77277
Lucoli AQ 14 1011 78288
Rocca di Cambio AQ 14 533 78821
Santo Stefano di Sessanio AQ 15 111 78932
Prata d'Ansidonia AQ 15 496 79428
Fagnano Alto AQ 15 418 79846
Tornimparte AQ 16 3187 83033
Pizzoli AQ 16 4326 87359
San Pio delle Camere AQ 18 661 88020
Scoppito AQ 18 3727 91747
Rocca di Mezzo AQ 18 1526 93273
Barete AQ 18 737 94010
Fontecchio AQ 19 369 94379
Pietracamela TE 19 271 94650
Calascio AQ 19 137 94787
Castelvecchio Calvisio AQ 19 153 94940
Carapelle Calvisio AQ 19 87 95027

Municipalities with at least 50000 inhabitants

An earthquake occurred to
6 Km E of L'Aquila (69753 inhabitants)
38 Km SW of Teramo (54892 inhabitants)
57 Km W of Chieti (51815 inhabitants)
58 Km W of Montesilvano (53738 inhabitants)
62 Km W of Pescara (121014 inhabitants)
71 Km E of Terni (111501 inhabitants)
71 Km NE of Tivoli (56533 inhabitants)
74 Km NE of Guidonia Montecelio (88673 inhabitants)
91 Km SE of Foligno (57155 inhabitants)
95 Km NE of Velletri (53303 inhabitants)
97 Km NE of Roma (2864731 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 2.5 1999-05-11
22:12:20
42.37 13.47 11 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 365579
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1999-05-11 22:12:20 ± 0.235
Latitude 42.37 ± 0.01
Longitude 13.47 ± 0.03
Depth (km) 11 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 365579

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) 2801.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 188
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.0004
Epicentral distance of station farthest from the epicenter (degree) 0.00631
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 365579
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 22:42:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.SDI.Z. 1999-05-11T22:12:46.30 10.0 undecidable manual SG 158 0.0063 0.86 0
--.NRCA.Z. 1999-05-11T22:12:40.40 10.0 undecidable manual SG 330 0.0048 0.02 0.5
--.SDI.Z. 1999-05-11T22:12:34.63 10.0 negative manual PG 158 0.0063 -0.44 0.9
--.PQ9.Z. 1999-05-11T22:12:33.93 10.0 undecidable manual SG 188 0.0031 -0.12 0.5
--.MNS.Z. 1999-05-11T22:12:32.89 10.0 undecidable manual PG 271 0.0053 0.04 1.2
--.NRCA.Z. 1999-05-11T22:12:31.71 10.0 negative manual PG 330 0.0048 -0.23 2
--.PQ9.Z. 1999-05-11T22:12:28.28 10.0 undecidable manual PG 188 0.0031 -0.21 1.2
--.AQU.Z. 1999-05-11T22:12:24.79 10.0 undecidable manual SG 255 0.0004 -0.38 0.3
--.AQU.Z. 1999-05-11T22:12:23.58 10.0 positive manual PG 255 0.0004 0.2 2.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download