Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.3 on date 14-01-2017 and time 03:50:20 (UTC) in region 1 km NE Ariccia (RM)

A magnitude ML 2.3 earthquake occured in region: 1 km NE Ariccia (RM), on

  • 14-01-2017 03:50:20 (UTC)
  • 14-01-2017 04:50:20 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.7280, 12.6840 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.

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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
Ariccia RM 1 19407 19407
Albano Laziale RM 2 41715 61122
Genzano di Roma RM 2 23970 85092
Nemi RM 3 1943 87035
Castel Gandolfo RM 4 8997 96032
Rocca di Papa RM 5 17034 113066
Marino RM 5 43026 156092
Lanuvio RM 6 13632 169724
Grottaferrata RM 7 20327 190051
Frascati RM 9 22087 212138
Velletri RM 9 53303 265441
Rocca Priora RM 10 11962 277403
Monte Compatri RM 10 11978 289381
Monte Porzio Catone RM 10 8693 298074
Ciampino RM 11 38412 336486
Lariano RM 12 13432 349918
Colonna RM 13 4287 354205
San Cesareo RM 14 15153 369358
Aprilia LT 15 73446 442804
Pomezia RM 16 62966 505770
Ardea RM 17 49183 554953
Zagarolo RM 18 17843 572796
Labico RM 18 6379 579175
Cisterna di Latina LT 19 36868 616043
Artena RM 19 14276 630319
Gallicano nel Lazio RM 20 6334 636653

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km NW of Velletri (53303 inhabitants)
15 Km N of Aprilia (73446 inhabitants)
16 Km E of Pomezia (62966 inhabitants)
25 Km SE of Roma (2864731 inhabitants)
28 Km SW of Tivoli (56533 inhabitants)
31 Km S of Guidonia Montecelio (88673 inhabitants)
31 Km N of Anzio (54211 inhabitants)
34 Km NW of Latina (125985 inhabitants)
37 Km E of Fiumicino (78395 inhabitants)
84 Km E of Civitavecchia (52991 inhabitants)
90 Km SE of Viterbo (67173 inhabitants)
91 Km SW of L'Aquila (69753 inhabitants)
93 Km S of Terni (111501 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 		ML 2.3 2017-01-14
03:50:20		 41.7275 12.684 11 2018-01-10
09:44:27		 Bollettino Sismico Italiano INGV 39133481
Reviewed
Rev100 		ML 2.3 2017-01-14
03:50:20		 41.7278 12.6777 10 2017-01-14
04:08:42		 Sala Sismica INGV-Roma 39023641
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-01-14 03:50:20 ± 0.1
Latitude 41.7275 ± 0.0045
Longitude 12.6840 ± 0.0096
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 39133481

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 813
Semi-minor axis of confidence ellipse (meter) 505
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 253
Circular confidence region, given by single value of horizontal uncertainty (meter) 810.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 141
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.45865
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:2.3

Field Value
Value 2.3
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 39133481
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2017-01-16 12:19:02

ML:2.3

Field Value
Value 2.3
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 39023641
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-01-14 04:08:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GIUL.HHZ. 2017-01-14T03:50:36.06 1.0 undecidable manual S 111 50.9157 50 -0.28 22
IV.LATB.EHZ. 2017-01-14T03:50:31.73 0.3 undecidable manual S 138 34.743 50 -0.29 68
IV.CERT.HHZ. 2017-01-14T03:50:31.88 0.3 undecidable manual S 45 34.743 50 -0.16 70
IV.MTCE.HHE. 2017-01-14T03:50:31.85 0.3 undecidable manual S 8 33.1446 50 0.26 69
IV.GIUL.HHZ. 2017-01-14T03:50:29.59 0.1 positive manual P 111 50.9157 50 0.08 92
IV.RCAV.EHZ. 2017-01-14T03:50:29.13 0.3 undecidable manual S 58 25.3524 50 -0.4 67
IV.CERT.HHZ. 2017-01-14T03:50:27.01 0.1 positive manual P 45 34.743 50 -0.02 96
IV.MTCE.HHE. 2017-01-14T03:50:26.97 0.1 undecidable manual P 8 33.1446 50 0.2 92
IV.LATB.EHZ. 2017-01-14T03:50:26.84 0.1 undecidable manual P 138 34.743 50 -0.17 93
IV.RCAV.EHZ. 2017-01-14T03:50:25.83 0.1 undecidable manual P 58 25.3524 50 0.25 93
IV.VIVA.HHZ. 2017-01-14T03:50:24.96 0.3 undecidable manual S 70 7.5813 144 0.28 71
IV.RMP.HHZ. 2017-01-14T03:50:24.76 0.3 undecidable manual S 9 9.3795 138 -0.32 70
IV.SAMA.HHZ. 2017-01-14T03:50:24.99 0.3 undecidable manual S 308 9.5793 138 -0.14 73
IV.LAV9.HNZ. 2017-01-14T03:50:24.26 0.3 undecidable manual S 167 5.6943 152 -0.07 75
IV.SAMA.HHZ. 2017-01-14T03:50:23.17 0.1 undecidable manual P 308 9.5793 138 0.14 98
IV.RDP.HHZ. 2017-01-14T03:50:23.65 3.0 undecidable manual S -0.47 0
IV.VIVA.HHZ. 2017-01-14T03:50:23.03 0.1 positive manual P 70 7.5813 144 0.25 96
IV.MA9.HHZ. 2017-01-14T03:50:23.53 0.3 undecidable manual S 336 5.0949 154 -0.71 63
IV.RMP.HHZ. 2017-01-14T03:50:23.18 0.1 positive manual P 9 9.3795 138 0.17 97
IV.MA9.HHZ. 2017-01-14T03:50:22.47 0.1 positive manual P 336 5.0949 154 -0.06 100
IV.LAV9.HNZ. 2017-01-14T03:50:22.86 0.1 positive manual P 167 5.6943 152 0.29 95
IV.RDP.HHZ. 2017-01-14T03:50:22.46 3.0 negative manual P -0.04 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LAV9.HHN. ML:2.4 0.004316136 1.6768 AML other m 2017-01-14T03:50:27.98
IV.LAV9.HHE. ML:2.5 0.005115237000000001 0.5376 AML other m 2017-01-14T03:50:27.19
IV.MA9.HHN. ML:2.2 0.0027645664999999997 0.4416 AML other m 2017-01-14T03:50:23.92
IV.MA9.HHE. ML:2.2 0.002774674 0.9984 AML other m 2017-01-14T03:50:24.19
IV.RDP.HHN. ML:2.6 0.006126097 1.52 AML other m 2017-01-14T03:50:24.98
IV.RDP.HHE. ML:2.3 0.0036027259999999997 1.4016 AML other m 2017-01-14T03:50:25.74
IV.RMP.HHE. ML:2.0 0.0011600000000000002 0.42 AML other m 2017-01-14T03:50:26.70
IV.RMP.HHN. ML:2.0 0.001159 0.32 AML other m 2017-01-14T03:50:29.57
IV.SAMA.HHN. ML:1.8 0.0007035 0.9 AML other m 2017-01-14T03:50:26.45
IV.VIVA.HHE. ML:2.6 0.0051951770000000005 0.3392 AML other m 2017-01-14T03:50:25.41
IV.VIVA.HHN. ML:2.5 0.0040856215 1.1392 AML other m 2017-01-14T03:50:26.80
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
Waveforms Seismic signals in miniseed + resp format Download