Earthquake with magnitude of Md 2.3 on date 22-09-1999 and time 22:38:08 (Italy) in region 5 km NE Cascia (PG)

A magnitude Md 2.3 earthquake occured in region: 5 km NE Cascia (PG), on

  • 22-09-1999 20:38:08 (UTC)
  • 22-09-1999 22:38:08 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.74, 13.07 at 9 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 5 3217 3217
Norcia PG 6 4957 8174
Poggiodomo PG 12 117 8291
Monteleone di Spoleto PG 14 599 8890
Cerreto di Spoleto PG 15 1075 9965
Preci PG 15 724 10689
Accumoli RI 16 667 11356
Cittareale RI 16 482 11838
Vallo di Nera PG 17 364 12202
Castelsantangelo sul Nera MC 18 281 12483
Arquata del Tronto AP 19 1178 13661
Sant'Anatolia di Narco PG 19 564 14225
Scheggino PG 20 461 14686
Sellano PG 20 1079 15765

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km SE of Foligno (57155 inhabitants)
40 Km NE of Terni (111501 inhabitants)
51 Km NW of L'Aquila (69753 inhabitants)
53 Km W of Teramo (54892 inhabitants)
69 Km SE of Perugia (166134 inhabitants)
87 Km E of Viterbo (67173 inhabitants)
87 Km NE of Guidonia Montecelio (88673 inhabitants)
90 Km N of Tivoli (56533 inhabitants)
92 Km W of Montesilvano (53738 inhabitants)
99 Km W of Pescara (121014 inhabitants)
100 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 2.3 1999-09-22
20:38:08
42.75 13.07 9 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 373989
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1999-09-22 20:38:08 ± 0.157
Latitude 42.75 ± 0.01
Longitude 13.07 ± 0.03
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 373989

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) 2670.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 198
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
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) 0.00081
Epicentral distance of station farthest from the epicenter (degree) 0.00866
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 373989
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 22:51:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1999-09-22T20:38:34.45 10.0 undecidable manual SG 353 0.0068 -0.28 0.3
--.FB9.Z. 1999-09-22T20:38:27.73 10.0 undecidable manual PG 347 0.0087 0.23 0.9
--.SNTG.Z. 1999-09-22T20:38:26.73 10.0 undecidable manual SG 349 0.0046 -0.28 0.4
--.MNS.Z. 1999-09-22T20:38:24.68 10.0 undecidable manual SG 218 0.0041 -0.45 0.2
--.ASS.Z. 1999-09-22T20:38:24.45 10.0 undecidable manual SG 316 0.0039 -0.05 0.7
--.ARV.Z. 1999-09-22T20:38:23.86 10.0 undecidable manual PG 353 0.0068 0.28 0.8
--.MNS.Z. 1999-09-22T20:38:18.50 10.0 undecidable manual PG 218 0.0041 0.02 1.9
--.SNTG.Z. 1999-09-22T20:38:18.82 10.0 undecidable manual PG 349 0.0046 -0.3 1
--.ASS.Z. 1999-09-22T20:38:17.90 10.0 undecidable manual PG 316 0.0039 0.23 1.3
--.NRCA.Z. 1999-09-22T20:38:12.55 10.0 undecidable manual SG 20 0.0008 -0.65 0
--.NRCA.Z. 1999-09-22T20:38:11.26 10.0 positive manual PG 20 0.0008 0.12 3.4
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