Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 4.0 on date 10-10-1999 and time 17:35:52 (Italy) in region 9 km NW Cittareale (RI)

A magnitude Md 4.0 earthquake occured in region: 9 km NW Cittareale (RI), on

  • 10-10-1999 15:35:52 (UTC)
  • 10-10-1999 17:35:52 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.68, 13.11 at 5 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.

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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
Cittareale RI 9 482 3699
Accumoli RI 12 667 4366
Norcia PG 12 4957 9323
Monteleone di Spoleto PG 13 599 9922
Poggiodomo PG 14 117 10039
Amatrice RI 16 2657 12696
Posta RI 18 694 13390
Leonessa RI 18 2435 15825
Arquata del Tronto AP 18 1178 17003
Borbona RI 19 617 17620

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km E of Terni (111501 inhabitants)
44 Km NW of L'Aquila (69753 inhabitants)
45 Km SE of Foligno (57155 inhabitants)
49 Km W of Teramo (54892 inhabitants)
75 Km SE of Perugia (166134 inhabitants)
82 Km NE of Guidonia Montecelio (88673 inhabitants)
84 Km NE of Tivoli (56533 inhabitants)
87 Km E of Viterbo (67173 inhabitants)
87 Km W of Montesilvano (53738 inhabitants)
94 Km W of Pescara (121014 inhabitants)
95 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
Bulletin
Rev1000 		Md 4.0
ML-VAX 3.5 		1999-10-10
15:35:52		 42.69 13.11 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 374909
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1999-10-10 15:35:52 ± 0.076
Latitude 42.69 ± 0.01
Longitude 13.11 ± 0.01
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 374909

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) 1214.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 111
Number of associated phases, regardless of their use for origin computation 61
Number of defining phases 61
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.0013
Epicentral distance of station farthest from the epicenter (degree) 0.03991
Number of stations at which the event was observed 48
Number of stations from which data was used for origin computation 48
Magnitudes information

Md:4

Field Value
Value 4
Uncertainty
Num. used stations 8
Type of magnitude Md
Reference to an origin 374909
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 22:51:59

ML:3.5

Field Value
Value 3.5
Uncertainty
Num. used stations 16
Type of magnitude ML
Reference to an origin 374909
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.PTCC.Z. 1999-10-10T15:37:33.00 10.0 undecidable manual SN 2 0.0334 0.41 0.4
--.CTI.Z. 1999-10-10T15:37:27.50 10.0 undecidable manual SN 343 0.0317 -0.25 0.4
--.SAL.Z. 1999-10-10T15:37:26.00 10.0 undecidable manual SN 328 0.0311 -0.31 0.4
--.VAI.Z. 1999-10-10T15:37:01.46 10.0 undecidable manual PN 317 0.0399 1.38 0.1
--.LCI.Z. 1999-10-10T15:36:59.47 10.0 undecidable manual PN 120 0.0397 -0.32 0.9
--.PII.Z. 1999-10-10T15:36:55.63 10.0 undecidable manual SN 299 0.0193 0.45 0.5
--.FVI.Z. 1999-10-10T15:36:52.95 10.0 positive manual PN 356 0.0352 0.14 2.1
--.CKI.Z. 1999-10-10T15:36:52.50 10.0 undecidable manual PN 298 0.0351 -0.18 1
--.PTCC.Z. 1999-10-10T15:36:49.46 10.0 positive manual PN 2 0.0334 -0.72 1.2
--.CTI.Z. 1999-10-10T15:36:48.18 10.0 undecidable manual PN 343 0.0317 0.79 0.5
--.ORI.Z. 1999-10-10T15:36:48.70 10.0 undecidable manual PN 135 0.0326 -0.26 1
--.LT9.Z. 1999-10-10T15:36:46.23 10.0 negative manual PN 125 0.0312 -0.43 1.8
--.BRT.Z. 1999-10-10T15:36:46.67 10.0 negative manual PN 119 0.0316 -0.65 1.3
--.SAL.Z. 1999-10-10T15:36:46.00 10.0 undecidable manual PN 328 0.0311 -0.56 0.8
--.TRI.Z. 1999-10-10T15:36:41.00 10.0 undecidable manual PN 8 0.0275 -0.07 1.2
--.SL9.Z. 1999-10-10T15:36:40.78 10.0 undecidable manual PN 139 0.0267 0.89 0.5
--.SGO.Z. 1999-10-10T15:36:36.00 10.0 undecidable manual PN 141 0.0241 0.03 1.3
--.RSM.Z. 1999-10-10T15:36:36.99 10.0 undecidable manual SN 339 0.012 1.23 0.1
--.MU9.Z. 1999-10-10T15:36:35.37 10.0 undecidable manual PN 136 0.0236 0.34 1.2
--.CA9.Z. 1999-10-10T15:36:34.34 10.0 undecidable manual PN 134 0.0223 1.05 0.4
--.GU9.Z. 1999-10-10T15:36:34.60 10.0 undecidable manual PN 313 0.0222 1.59 0.1
--.ZC9.Z. 1999-10-10T15:36:33.40 10.0 undecidable manual PN! 317 0.0204 3.13 0
--.BDI.Z. 1999-10-10T15:36:31.19 10.0 undecidable manual PN 307 0.0206 0.73 0.8
--.FG4.Z. 1999-10-10T15:36:31.57 10.0 undecidable manual PN 130 0.0213 -0.07 1.4
--.CI9.Z. 1999-10-10T15:36:30.27 10.0 undecidable manual PN 141 0.0208 -0.62 0.9
--.PII.Z. 1999-10-10T15:36:28.65 10.0 undecidable manual PN 299 0.0193 0.06 1.5
--.FG5.Z. 1999-10-10T15:36:28.41 10.0 undecidable manual PN 130 0.0191 0.06 1.5
--.PSB1.Z. 1999-10-10T15:36:26.68 10.0 undecidable manual PN 138 0.0173 1.05 0.4
--.RDP.Z. 1999-10-10T15:36:26.50 10.0 undecidable manual SG 197 0.0087 0.21 0.6
--.VTB1.Z. 1999-10-10T15:36:24.29 10.0 undecidable manual PN 142 0.0169 -0.61 1
--.SMB1.Z. 1999-10-10T15:36:23.49 10.0 undecidable manual PN 136 0.0158 0.25 1.5
--.MAB1.Z. 1999-10-10T15:36:23.75 10.0 undecidable manual PN 143 0.0158 0.5 1.2
--.GRFL.Z. 1999-10-10T15:36:22.23 10.0 positive manual PN 287 0.0146 0.79 1.5
--.ARV.Z. 1999-10-10T15:36:21.00 10.0 undecidable manual SG 351 0.0074 -0.5 0.5
--.BAI2.Z. 1999-10-10T15:36:21.34 10.0 undecidable manual PN 137 0.0142 0.41 1.3
--.CSNT.Z. 1999-10-10T15:36:20.21 10.0 undecidable manual PN 301 0.0138 -0.05 1.6
--.PGD.Z. 1999-10-10T15:36:20.47 10.0 undecidable manual PN 320 0.014 -0.04 1.6
--.SFI.Z. 1999-10-10T15:36:20.47 10.0 undecidable manual PN 323 0.0137 0.45 1.3
--.RFI.Z. 1999-10-10T15:36:19.56 10.0 undecidable manual PN 154 0.0138 -0.54 1.1
--.CPI2.Z. 1999-10-10T15:36:18.64 10.0 undecidable manual PN 140 0.0127 0.06 1.6
--.RSM.Z. 1999-10-10T15:36:17.50 10.0 undecidable manual PN 339 0.012 -0.32 1.4
--.CRVI.Z. 1999-10-10T15:36:17.19 10.0 undecidable manual PN 136 0.0117 0.14 1.6
--.PQ9.Z. 1999-10-10T15:36:17.00 10.0 undecidable manual SG 161 0.0062 -0.52 0.5
--.RNI2.Z. 1999-10-10T15:36:16.57 10.0 undecidable manual PN 141 0.0113 0.31 1.4
--.CRE.Z. 1999-10-10T15:36:16.51 10.0 undecidable manual PN 318 0.0113 0.14 1.6
--.RVI2.Z. 1999-10-10T15:36:14.40 10.0 undecidable manual PN! 147 0.0113 -2.01 0
--.SDI.Z. 1999-10-10T15:36:14.70 10.0 undecidable manual PN 151 0.0099 -0.2 1.5
--.SNTG.Z. 1999-10-10T15:36:14.00 10.0 undecidable manual SG 347 0.0052 0.19 0.6
--.FB9.Z. 1999-10-10T15:36:12.41 10.0 undecidable manual PG 346 0.0093 -0.68 0.9
--.ASS.Z. 1999-10-10T15:36:11.50 10.0 undecidable manual SG 318 0.0045 0.21 0.6
--.RDP.Z. 1999-10-10T15:36:11.57 10.0 positive manual PG 197 0.0087 -0.34 2.8
--.MNS.Z. 1999-10-10T15:36:09.00 10.0 undecidable manual SG 226 0.0039 -0.1 0.6
--.ARV.Z. 1999-10-10T15:36:07.86 10.0 positive manual PG 351 0.0074 -1.29 0.4
--.AQU.Z. 1999-10-10T15:36:07.50 10.0 undecidable manual SG 146 0.0036 -0.1 0.6
--.SNTG.Z. 1999-10-10T15:36:03.65 10.0 positive manual PG 347 0.0052 -1.05 0.8
--.PQ9.Z. 1999-10-10T15:36:03.49 10.0 positive manual PG! 161 0.0062 -3.35 0
--.ASS.Z. 1999-10-10T15:36:02.88 10.0 positive manual PG 318 0.0045 -0.36 2.7
--.MNS.Z. 1999-10-10T15:36:01.12 10.0 positive manual PG 226 0.0039 -0.86 1.3
--.AQU.Z. 1999-10-10T15:35:58.29 10.0 positive manual PG! 146 0.0036 -2.83 0
--.NRCA.Z. 1999-10-10T15:35:58.00 10.0 undecidable manual SG 1 0.0013 -0.21 0.6
--.NRCA.Z. 1999-10-10T15:35:56.17 10.0 negative manual PG 1 0.0013 0.48 2.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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Type Description Link
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