Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 04-08-2018 and time 19:29:03 (UTC) in region 2 km NE Contigliano (RI)

A magnitude ML 0.9 earthquake occured in region: 2 km NE Contigliano (RI), on

  • 04-08-2018 19:29:03 (UTC)
  • 04-08-2018 21:29:03 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.4240, 12.7780 at 11 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Contigliano RI 2 3783 3783
Greccio RI 4 1558 5341
Rieti RI 7 47698 53039
Cottanello RI 8 563 53602
Colli sul Velino RI 9 533 54135
Montasola RI 9 395 54530
Monte San Giovanni in Sabina RI 11 714 55244
Configni RI 11 633 55877
Cantalice RI 12 2755 58632
Labro RI 12 374 59006
Rivodutri RI 12 1253 60259
Vacone RI 12 256 60515
Morro Reatino RI 12 373 60888
Poggio Bustone RI 13 2055 62943
Stroncone TR 13 4917 67860
Casperia RI 13 1246 69106
Roccantica RI 13 563 69669
Torri in Sabina RI 14 1256 70925
Cittaducale RI 15 6828 77753
Belmonte in Sabina RI 15 636 78389
Poggio Catino RI 16 1341 79730
Montebuono RI 16 883 80613
Montenero Sabino RI 16 299 80912
Tarano RI 17 1444 82356
Cantalupo in Sabina RI 17 1685 84041
Selci RI 17 1106 85147
Calvi dell'Umbria TR 18 1856 87003
Arrone TR 18 2763 89766
Salisano RI 19 567 90333
Terni TR 19 111501 201834
Polino TR 19 233 202067
Casaprota RI 19 744 202811
Poggio Mirteto RI 19 6315 209126
Montefranco TR 19 1276 210402
Torricella in Sabina RI 20 1342 211744
Mompeo RI 20 530 212274
Poggio San Lorenzo RI 20 589 212863

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km SE of Terni (111501 inhabitants)
47 Km N of Guidonia Montecelio (88673 inhabitants)
51 Km N of Tivoli (56533 inhabitants)
52 Km W of L'Aquila (69753 inhabitants)
55 Km E of Viterbo (67173 inhabitants)
60 Km S of Foligno (57155 inhabitants)
64 Km NE of Roma (2864731 inhabitants)
80 Km W of Teramo (54892 inhabitants)
82 Km N of Velletri (53303 inhabitants)
82 Km SE of Perugia (166134 inhabitants)
85 Km NE of Fiumicino (78395 inhabitants)
87 Km N of Pomezia (62966 inhabitants)
89 Km E of Civitavecchia (52991 inhabitants)
93 Km N of Aprilia (73446 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
Reviewed
Rev100 		ML 0.9 2018-08-04
19:29:03		 42.4237 12.7783 11 2018-08-04
19:35:47		 Sala Sismica INGV-Roma 59364541
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-08-04 19:29:03 ± 0.08
Latitude 42.4237 ± 0.0027
Longitude 12.7783 ± 0.0049
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 59364541

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 357
Semi-minor axis of confidence ellipse (meter) 194
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 75
Circular confidence region, given by single value of horizontal uncertainty (meter) 360.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 96
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.15558
Epicentral distance of station farthest from the epicenter (degree) 0.49732
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 59364541
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-08-04 19:35:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.NRCA.HHZ. 2018-08-04T19:29:20.44 0.3 undecidable manual S 31 53.1024 50 0.07 71
IV.CERT.HHZ. 2018-08-04T19:29:20.82 0.3 undecidable manual S 162 55.2003 50 -0.12 70
IV.MOMA.HHZ. 2018-08-04T19:29:18.29 0.1 undecidable manual S 338 45.5211 50 -0.04 96
IV.RM33.HNN. 2018-08-04T19:29:16.23 0.3 undecidable manual S 75 36.9297 50 0.18 71
IV.FIAM.HHZ. 2018-08-04T19:29:15.12 0.1 undecidable manual S 122 32.745 50 0.19 95
IV.SRES.HHZ. 2018-08-04T19:29:14.71 0.1 undecidable manual S 227 30.2475 50 0.45 91
OB.GAVE.EHZ. 2018-08-04T19:29:14.50 0.3 undecidable manual S 18 31.2465 50 -0.03 74
IV.LNSS.HHZ. 2018-08-04T19:29:14.22 0.1 undecidable manual S 47 29.2485 50 0.23 95
IV.NRCA.HHZ. 2018-08-04T19:29:13.08 0.3 positive manual P 31 53.1024 50 -0.23 68
IV.CERT.HHZ. 2018-08-04T19:29:13.44 0.3 undecidable manual P 162 55.2003 50 -0.2 69
IV.CESX.HHZ. 2018-08-04T19:29:12.92 0.3 undecidable manual S 323 25.752 50 -0.16 73
IV.MOMA.HHZ. 2018-08-04T19:29:11.87 0.3 undecidable manual P 338 45.5211 50 -0.27 69
IV.MTCE.HHE. 2018-08-04T19:29:11.60 0.6 undecidable manual P 184 44.5221 50 -0.39 45
IV.RM33.HNN. 2018-08-04T19:29:10.85 0.1 undecidable manual P 75 36.9297 50 0.03 98
IV.ARRO.EHZ. 2018-08-04T19:29:10.89 0.1 undecidable manual S 357 17.2716 122 0.15 99
IV.LNSS.HHZ. 2018-08-04T19:29:09.58 0.1 undecidable manual P 47 29.2485 50 -0.05 99
IV.SRES.HHZ. 2018-08-04T19:29:09.82 0.3 undecidable manual P 227 30.2475 50 0.04 74
OB.GAVE.EHZ. 2018-08-04T19:29:09.84 0.1 negative manual P 18 31.2465 50 -0.1 98
IV.FIAM.HHZ. 2018-08-04T19:29:09.92 0.1 undecidable manual P 122 32.745 50 -0.25 94
IV.CESX.HHZ. 2018-08-04T19:29:09.19 0.3 undecidable manual P 323 25.752 50 0.09 74
IV.ARRO.EHZ. 2018-08-04T19:29:07.85 0.1 negative manual P 357 17.2716 122 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARRO.EHE. ML:0.9 0.00007055000000000001 0.24 AML other m 2018-08-04T19:29:10.97
IV.ARRO.EHN. ML:1.0 0.00007495 0.84 AML other m 2018-08-04T19:29:12.00
IV.SRES.HHE. ML:0.6 0.0000205 1.76 AML other m 2018-08-04T19:29:16.04
IV.FIAM.HHE. ML:0.7 0.000020799999999999997 1.32 AML other m 2018-08-04T19:29:16.16
IV.SRES.HHN. ML:0.6 0.000018100000000000003 0.46 AML other m 2018-08-04T19:29:16.65
IV.MOMA.HHN. ML:1.4 0.00006604999999999999 0.8 AML other m 2018-08-04T19:29:18.97
IV.MOMA.HHE. ML:1.3 0.00005925 1.48 AML other m 2018-08-04T19:29:19.99
IV.FIAM.HHN. ML:0.5 0.00001565 0.82 AML other m 2018-08-04T19:29:19.02
IV.NRCA.HHE. ML:1.1 0.0000286 0.82 AML other m 2018-08-04T19:29:21.50
IV.NRCA.HHN. ML:0.9 0.00001975 0.1 AML other m 2018-08-04T19:29:22.71
IV.CERT.HHN. ML:0.9 0.000019 0.52 AML other m 2018-08-04T19:29:23.19
IV.CERT.HHE. ML:0.8 0.0000165 1.18 AML other m 2018-08-04T19:29:23.21
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download