Earthquake with magnitude of Md 2.1 on date 10-05-1999 and time 04:47:33 (Italy) in region 9 km SE Norcia (PG)

A magnitude Md 2.1 earthquake occured in region: 9 km SE Norcia (PG), on

  • 10-05-1999 02:47:33 (UTC)
  • 10-05-1999 04:47:33 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.71, 13.13 at 7 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
Cascia PG 9 3217 3217
Norcia PG 9 4957 8174
Accumoli RI 10 667 8841
Cittareale RI 11 482 9323
Arquata del Tronto AP 15 1178 10501
Poggiodomo PG 16 117 10618
Monteleone di Spoleto PG 16 599 11217
Amatrice RI 16 2657 13874
Preci PG 20 724 14598

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km E of Terni (111501 inhabitants)
44 Km SE of Foligno (57155 inhabitants)
46 Km NW of L'Aquila (69753 inhabitants)
48 Km W of Teramo (54892 inhabitants)
74 Km SE of Perugia (166134 inhabitants)
86 Km NE of Guidonia Montecelio (88673 inhabitants)
87 Km W of Montesilvano (53738 inhabitants)
88 Km NE of Tivoli (56533 inhabitants)
90 Km E of Viterbo (67173 inhabitants)
93 Km W of Pescara (121014 inhabitants)
94 Km W of Chieti (51815 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 2.1 1999-05-10
02:47:33
42.71 13.13 7 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 365469
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1999-05-10 02:47:33 ± 0.248
Latitude 42.71 ± 0.02
Longitude 13.13 ± 0.04
Depth (km) 7 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 365469

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) 3782.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 155
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) 0.00105
Epicentral distance of station farthest from the epicenter (degree) 0.00437
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:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 365469
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 22:42:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ASS.Z. 1999-05-10T02:47:52.45 10.0 undecidable manual SG 315 0.0044 0.44 0.4
--.MNS.Z. 1999-05-10T02:47:51.73 10.0 undecidable manual SG 225 0.0041 0.56 0.3
--.AQU.Z. 1999-05-10T02:47:48.62 10.0 undecidable manual SG 150 0.0036 -0.85 0.1
--.AQU.Z. 1999-05-10T02:47:43.37 10.0 undecidable manual PG 150 0.0036 0.58 0.7
--.MNS.Z. 1999-05-10T02:47:43.37 10.0 undecidable manual PG 225 0.0041 -0.4 1
--.ASS.Z. 1999-05-10T02:47:43.96 10.0 undecidable manual PG 315 0.0044 -0.3 1.3
--.NRCA.Z. 1999-05-10T02:47:38.53 10.0 undecidable manual SG 354 0.0011 -0.27 0.6
--.NRCA.Z. 1999-05-10T02:47:36.71 10.0 positive manual PG 354 0.0011 0.08 3.7
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