Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 18-06-2021 and time 12:47:17 (Italy) in region 3 km NW Colleferro (RM)

A magnitude ML 1.4 earthquake occured in region: 3 km NW Colleferro (RM), on

  • 18-06-2021 10:47:17 (UTC)
  • 18-06-2021 12:47:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.7530, 12.9770 at 8 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
Colleferro RM 4 21595 21595
Artena RM 5 14276 35871
Valmontone RM 6 15959 51830
Segni RM 8 9159 60989
Cave RM 8 11287 72276
Labico RM 8 6379 78655
Gavignano RM 9 1916 80571
Genazzano RM 9 6036 86607
Paliano FR 9 8281 94888
Rocca Massima LT 9 1136 96024
Rocca di Cave RM 11 377 96401
Palestrina RM 12 21672 118073
Lariano RM 12 13432 131505
Capranica Prenestina RM 12 351 131856
Castel San Pietro Romano RM 12 902 132758
Montelanico RM 13 2131 134889
Olevano Romano RM 13 6687 141576
Cori LT 13 11065 152641
Serrone FR 14 3099 155740
San Vito Romano RM 15 3273 159013
Anagni FR 15 21464 180477
Bellegra RM 15 2887 183364
Roiate RM 15 737 184101
Gorga RM 16 710 184811
Zagarolo RM 16 17843 202654
San Cesareo RM 16 15153 217807
Poli RM 17 2418 220225
Piglio FR 17 4666 224891
Acuto FR 17 1920 226811
Sgurgola FR 17 2676 229487
Pisoniano RM 17 770 230257
Affile RM 18 1548 231805
Velletri RM 18 53303 285108
Rocca Santo Stefano RM 18 975 286083
Rocca Priora RM 18 11962 298045
Arcinazzo Romano RM 18 1348 299393
Gallicano nel Lazio RM 18 6334 305727
Norma LT 19 3946 309673
Casape RM 19 744 310417
Carpineto Romano RM 19 4524 314941

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km E of Velletri (53303 inhabitants)
28 Km SE of Tivoli (56533 inhabitants)
32 Km N of Latina (125985 inhabitants)
32 Km NE of Aprilia (73446 inhabitants)
34 Km SE of Guidonia Montecelio (88673 inhabitants)
40 Km E of Pomezia (62966 inhabitants)
44 Km E of Roma (2864731 inhabitants)
45 Km NE of Anzio (54211 inhabitants)
61 Km E of Fiumicino (78395 inhabitants)
75 Km SW of L'Aquila (69753 inhabitants)
94 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 1.4 2021-06-18
10:47:17		 41.7532 12.9768 8 2021-12-29
11:12:40		 Bollettino Sismico Italiano INGV 96984561
Reviewed
Rev100 		ML 1.4 2021-06-18
10:47:17		 41.7488 12.9903 6 2021-06-18
10:56:35		 Sala Sismica INGV-Roma 91491121
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-06-18 10:47:17 ± 0.08
Latitude 41.7532 ± 0.0027
Longitude 12.9768 ± 0.0060
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 96984561

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 489
Semi-minor axis of confidence ellipse (meter) 238
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 254
Circular confidence region, given by single value of horizontal uncertainty (meter) 490.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 145
Number of associated phases, regardless of their use for origin computation 43
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.54949
Number of stations at which the event was observed 33
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 96984561
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-10-25 16:39:21

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 91491121
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-06-18 10:56:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EUCT.HNZ. 2021-06-18T10:49:19.66 3.0 undecidable manual Sg 22.389999 0
GU.RNCA.HHZ. 2021-06-18T10:49:08.91 3.0 undecidable manual Sg 22.41 0
IV.TREG.EHZ. 2021-06-18T10:49:00.58 3.0 undecidable manual Sg 12.58 0
IV.TDS.HHZ. 2021-06-18T10:48:42.12 3.0 undecidable manual Sn -0.13 0
IV.HVIT.HHZ. 2021-06-18T10:48:36.80 3.0 undecidable manual Pg 16.16 0
IV.ESML.HHZ. 2021-06-18T10:48:26.41 3.0 negative manual Pg 12.55 0
IV.RESU.HHZ. 2021-06-18T10:48:25.17 3.0 undecidable manual Pg 14.4 0
GU.RRL.HHZ. 2021-06-18T10:48:25.40 3.0 undecidable manual Pn 2.49 0
IV.PLLN.EHZ. 2021-06-18T10:48:24.70 3.0 undecidable manual Pg 18.190001 0
MN.TRI.HHZ. 2021-06-18T10:48:19.09 3.0 negative manual Pg 13.98 0
IV.SFI.EHZ. 2021-06-18T10:48:16.64 3.0 undecidable manual Sg 8.53 0
MN.CEL.HHZ. 2021-06-18T10:48:13.98 3.0 negative manual Pn 2.78 0
RF.GEPF.HHZ. 2021-06-18T10:48:12.85 3.0 negative manual Pn 1.06 0
CR.STON.BHZ. 2021-06-18T10:48:07.80 3.0 undecidable manual Pn 3.27 0
IV.PESA.HHZ. 2021-06-18T10:48:05.20 3.0 undecidable manual Sn -2.04 0
GU.GSCL.HHZ. 2021-06-18T10:47:59.54 3.0 undecidable manual Pg 8.2 0
IV.CRTO.HHZ. 2021-06-18T10:47:57.97 3.0 undecidable manual Sn -0.65 0
IV.FOSV.EHZ. 2021-06-18T10:47:55.33 3.0 undecidable manual Sg 2.48 0
IV.VCEL.EHZ. 2021-06-18T10:47:47.71 3.0 undecidable manual Sg 2.79 0
IV.TOLF.HHZ. 2021-06-18T10:47:39.11 3.0 undecidable manual Sg 2.79 0
IV.PP3.EHZ. 2021-06-18T10:47:36.40 3.0 positive manual Pn 0.93 0
IV.POFI.HNE. 2021-06-18T10:47:36.68 0.6 undecidable manual S 93 60.9945 50 0.28 44
IV.VVLD.HHZ. 2021-06-18T10:47:34.54 0.6 undecidable manual S 76 55.0005 50 -0.26 45
IV.LRP.EHZ. 2021-06-18T10:47:34.32 0.6 undecidable manual S 103 51.8037 50 0.36 44
IV.MMUR.HNZ. 2021-06-18T10:47:33.33 3.0 positive manual Pn -1.2 0
IV.PTQR.HHZ. 2021-06-18T10:47:32.21 0.6 undecidable manual S 49 45.9207 50 -0.18 46
IV.TST01.HHZ. 2021-06-18T10:47:29.98 3.0 positive manual Pn -1.13 0
IV.POFI.HNE. 2021-06-18T10:47:28.16 0.3 undecidable manual P 93 60.9945 50 -0.05 69
IV.GIUL.HHZ. 2021-06-18T10:47:28.47 0.3 undecidable manual S 133 31.5462 105 0.12 72
IV.LATB.EHZ. 2021-06-18T10:47:27.13 0.6 undecidable manual S 182 28.749 106 -0.28 47
IV.VVLD.HHZ. 2021-06-18T10:47:26.96 0.3 undecidable manual P 76 55.0005 50 -0.33 66
IV.LRP.EHZ. 2021-06-18T10:47:26.82 0.3 undecidable manual P 103 51.8037 50 0.02 71
IV.PTQR.HHZ. 2021-06-18T10:47:26.28 0.3 undecidable manual P 49 45.9207 50 0.38 67
IV.GUAR.HHZ. 2021-06-18T10:47:26.89 0.6 undecidable manual S 80 28.1496 106 -0.3 47
IV.MTCE.HHZ. 2021-06-18T10:47:24.16 0.3 undecidable manual P 327 35.6421 50 -0.15 71
IV.CERT.HHZ. 2021-06-18T10:47:24.97 0.3 undecidable manual S 1 21.7671 111 -0.12 74
IV.LATB.EHZ. 2021-06-18T10:47:23.04 0.3 undecidable manual P 182 28.749 106 0.02 74
IV.TOLF.HHZ. 2021-06-18T10:47:23.12 3.0 negative manual P -0.11 0
IV.GIUL.HHZ. 2021-06-18T10:47:23.55 0.3 undecidable manual P 133 31.5462 105 -0.01 74
IV.GUAR.HHZ. 2021-06-18T10:47:22.93 0.3 undecidable manual P 80 28.1496 106 0.03 74
IV.RCAV.EHZ. 2021-06-18T10:47:21.82 0.6 undecidable manual S 346 10.7781 127 0.1 50
IV.CERT.HHZ. 2021-06-18T10:47:21.66 0.1 positive manual P 1 21.7671 111 -0.02 100
IV.RCAV.EHZ. 2021-06-18T10:47:20.03 0.3 undecidable manual P 346 10.7781 127 0.29 72
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RCAV.EHN. ML:1.7 0.0006715 0.42 AML other m 2021-06-18T10:47:22.76
IV.RCAV.EHE. ML:1.8 0.0007524999999999999 0.86 AML other m 2021-06-18T10:47:22.69
IV.CERT.HHE. ML:1.2 0.00010314999999999999 0.46 AML other m 2021-06-18T10:47:25.62
IV.CERT.HHN. ML:1.2 0.00010545 1 AML other m 2021-06-18T10:47:26.63
IV.GIUL.HHE. ML:1.5 0.0001545 1.38 AML other m 2021-06-18T10:47:28.13
IV.GIUL.HHN. ML:1.4 0.000122 1.18 AML other m 2021-06-18T10:47:29.16
IV.GUAR.HHE. ML:1.3 0.0001086 0.36 AML other m 2021-06-18T10:47:29.70
IV.GUAR.HHN. ML:1.3 0.00011135000000000001 1.7 AML other m 2021-06-18T10:47:29.94
IV.LRP.EHE. ML:1.4 0.00006715 0.94 AML other m 2021-06-18T10:47:35.12
IV.LRP.EHN. ML:0.9 0.000018250000000000003 0.86 AML other m 2021-06-18T10:47:36.03
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