Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 07-04-2021 and time 01:40:53 (UTC) in region Rocca Sinibalda (RI)

A magnitude ML 1.8 earthquake occured in region: Rocca Sinibalda (RI), on

  • 07-04-2021 01:40:53 (UTC)
  • 07-04-2021 03:40:53 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.2750, 12.9250 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Rocca Sinibalda RI 0 815 815
Longone Sabino RI 3 597 1412
Torricella in Sabina RI 5 1342 2754
Belmonte in Sabina RI 6 636 3390
Poggio San Lorenzo RI 7 589 3979
Monteleone Sabino RI 7 1224 5203
Colle di Tora RI 7 372 5575
Castel di Tora RI 7 288 5863
Concerviano RI 8 291 6154
Varco Sabino RI 9 187 6341
Poggio Moiano RI 9 2751 9092
Montenero Sabino RI 9 299 9391
Casaprota RI 10 744 10135
Ascrea RI 11 234 10369
Frasso Sabino RI 11 743 11112
Paganico Sabino RI 11 172 11284
Marcetelli RI 11 89 11373
Petrella Salto RI 12 1197 12570
Poggio Nativo RI 12 2622 15192
Cittaducale RI 13 6828 22020
Pozzaglia Sabina RI 13 360 22380
Monte San Giovanni in Sabina RI 13 714 23094
Scandriglia RI 14 3108 26202
Collegiove RI 14 213 26415
Mompeo RI 15 530 26945
Salisano RI 15 567 27512
Rieti RI 15 47698 75210
Castelnuovo di Farfa RI 16 1059 76269
Toffia RI 16 1058 77327
Orvinio RI 16 405 77732
Castel Sant'Angelo RI 16 1308 79040
Fiamignano RI 17 1413 80453
Nerola RM 17 1926 82379
Turania RI 17 241 82620
Fara in Sabina RI 18 13742 96362
Nespolo RI 18 246 96608
Montorio Romano RM 18 1984 98592
Borgo Velino RI 18 972 99564
Collalto Sabino RI 18 442 100006
Poggio Catino RI 19 1341 101347
Montopoli di Sabina RI 19 4210 105557
Roccantica RI 20 563 106120
Monteflavio RM 20 1348 107468
Poggio Mirteto RI 20 6315 113783
Contigliano RI 20 3783 117566
Percile RM 20 255 117821

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km NE of Guidonia Montecelio (88673 inhabitants)
36 Km N of Tivoli (56533 inhabitants)
39 Km SE of Terni (111501 inhabitants)
40 Km W of L'Aquila (69753 inhabitants)
56 Km NE of Roma (2864731 inhabitants)
67 Km N of Velletri (53303 inhabitants)
69 Km E of Viterbo (67173 inhabitants)
76 Km NE of Pomezia (62966 inhabitants)
77 Km SW of Teramo (54892 inhabitants)
78 Km S of Foligno (57155 inhabitants)
79 Km N of Aprilia (73446 inhabitants)
80 Km NE of Fiumicino (78395 inhabitants)
90 Km N of Latina (125985 inhabitants)
95 Km N of Anzio (54211 inhabitants)
95 Km E of Civitavecchia (52991 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 1.8 2021-04-07
01:40:53		 42.275 12.9248 11 2021-07-12
16:55:09		 Bollettino Sismico Italiano INGV 89768211
Reviewed
Rev100 		ML 1.8 2021-04-07
01:40:53		 42.2803 12.9233 11 2021-04-07
01:47:38		 Sala Sismica INGV-Roma 88860191
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-07 01:40:53 ± 0.09
Latitude 42.2750 ± 0.0036
Longitude 12.9248 ± 0.0061
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 89768211

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 461
Semi-minor axis of confidence ellipse (meter) 173
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 99
Circular confidence region, given by single value of horizontal uncertainty (meter) 460.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 60
Number of associated phases, regardless of their use for origin computation 46
Number of defining phases 46
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.13310
Epicentral distance of station farthest from the epicenter (degree) 0.84177
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 23
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 88860191
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-07 01:47:38

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 89768211
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-04 15:29:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MF5.EHZ. 2021-04-07T01:41:21.19 1.0 undecidable manual S 29 90.3429 50 1.46 13
IV.CSP1.EHZ. 2021-04-07T01:41:21.63 0.6 undecidable manual S 14 93.4398 50 1.07 31
IV.FDMO.HHZ. 2021-04-07T01:41:19.24 0.3 undecidable manual S 9 85.5477 50 0.8 54
IV.LATB.EHZ. 2021-04-07T01:41:18.64 0.3 undecidable manual S 178 86.7465 50 -0.12 66
IV.MMO1.EHZ. 2021-04-07T01:41:17.14 0.3 undecidable manual S 25 76.6677 50 1.06 49
IV.MC2.EHZ. 2021-04-07T01:41:16.12 0.3 undecidable manual S 17 73.7706 50 0.8 55
IV.NRCA.HHZ. 2021-04-07T01:41:13.16 0.3 undecidable manual S 14 63.8916 50 0.5 63
IV.GUAR.HNN. 2021-04-07T01:41:12.38 1.0 undecidable manual S 149 62.0934 50 0.18 23
IV.SMA1.EHZ. 2021-04-07T01:41:09.66 0.3 undecidable manual S 40 51.8037 50 0.21 69
IV.MF5.EHZ. 2021-04-07T01:41:08.58 0.1 undecidable manual P 29 90.3429 50 0.12 87
IV.CSP1.EHZ. 2021-04-07T01:41:08.92 0.1 undecidable manual P 14 93.4398 50 -0.02 88
IV.RCAV.EHZ. 2021-04-07T01:41:08.60 0.3 undecidable manual S 178 47.5191 50 0.31 68
IV.PTQR.HHZ. 2021-04-07T01:41:08.81 0.3 undecidable manual S 126 48.1185 50 0.34 68
IV.CESX.HHE. 2021-04-07T01:41:07.82 0.3 undecidable manual S 323 46.2204 50 -0.13 71
IV.LATB.EHZ. 2021-04-07T01:41:07.25 0.3 undecidable manual P 178 86.7465 50 -0.65 57
IV.GAVE.EHZ. 2021-04-07T01:41:07.64 0.3 undecidable manual S 357 46.3203 50 -0.35 68
IV.FDMO.HHZ. 2021-04-07T01:41:07.38 0.1 undecidable manual P 9 85.5477 50 -0.34 84
IV.MC2.EHZ. 2021-04-07T01:41:05.85 0.1 undecidable manual P 17 73.7706 50 -0.06 91
IV.LNSS.HHZ. 2021-04-07T01:41:05.76 0.3 undecidable manual S 15 37.5291 50 0.11 72
IV.MMO1.EHZ. 2021-04-07T01:41:05.95 0.1 undecidable manual P 25 76.6677 50 -0.4 84
IV.SRES.HHZ. 2021-04-07T01:41:05.16 0.6 undecidable manual S 263 34.3434 50 0.38 46
MN.AQU.HNN. 2021-04-07T01:41:05.80 0.3 undecidable manual S 77 40.3263 50 -0.59 64
IV.CERT.HHZ. 2021-04-07T01:41:05.16 0.3 undecidable manual S 173 36.4413 50 -0.19 71
IV.MTCE.HHZ. 2021-04-07T01:41:04.11 0.3 undecidable manual S 208 31.746 50 0.02 74
IV.RM33.EHZ. 2021-04-07T01:41:04.69 0.3 undecidable manual S 42 35.1426 50 -0.31 70
IV.ARRO.EHZ. 2021-04-07T01:41:04.82 0.3 undecidable manual S 339 36.1416 50 -0.45 67
IV.GUAR.HNN. 2021-04-07T01:41:04.30 0.3 undecidable manual P 149 62.0934 50 0.19 68
IV.NRCA.HHZ. 2021-04-07T01:41:03.98 0.1 undecidable manual P 14 63.8916 50 -0.4 86
IV.PTQR.HHZ. 2021-04-07T01:41:02.91 0.3 undecidable manual P 126 48.1185 50 0.95 54
IV.SMA1.EHZ. 2021-04-07T01:41:02.28 0.1 undecidable manual P 40 51.8037 50 -0.24 91
IV.GAVE.EHZ. 2021-04-07T01:41:01.35 0.1 undecidable manual P 357 46.3203 50 -0.33 91
IV.RCAV.EHZ. 2021-04-07T01:41:01.74 0.1 undecidable manual P 178 47.5191 50 -0.12 95
IT.CSO1.HGZ. 2021-04-07T01:41:01.91 0.3 undecidable manual S 145 23.5542 50 0.02 75
IV.CESX.HHE. 2021-04-07T01:41:01.58 0.1 undecidable manual P 323 46.2204 50 -0.08 95
MN.AQU.HNN. 2021-04-07T01:41:00.47 0.1 undecidable manual P 77 40.3263 50 -0.29 92
IV.SRES.HHZ. 2021-04-07T01:40:59.90 0.1 undecidable manual P 263 34.3434 50 0.07 98
IV.CERT.HHZ. 2021-04-07T01:40:59.96 0.1 undecidable manual P 173 36.4413 50 -0.2 95
IV.MTCE.HHZ. 2021-04-07T01:40:59.39 0.1 undecidable manual P 208 31.746 50 -0.04 99
IV.LNSS.HHZ. 2021-04-07T01:40:59.94 0.1 undecidable manual P 15 37.5291 50 -0.39 91
IV.FIAM.HHZ. 2021-04-07T01:40:59.65 0.3 undecidable manual S 93 15.7731 124 -0.02 76
IV.RM33.EHZ. 2021-04-07T01:40:59.70 0.1 undecidable manual P 42 35.1426 50 -0.26 94
IV.ARRO.EHZ. 2021-04-07T01:40:59.97 0.1 undecidable manual P 339 36.1416 50 -0.14 96
IT.MMP1.HGZ. 2021-04-07T01:40:59.62 0.3 undecidable manual S 259 14.7741 126 0.24 73
IT.CSO1.HGZ. 2021-04-07T01:40:58.41 0.1 undecidable manual P 145 23.5542 50 0.25 96
IT.MMP1.HGZ. 2021-04-07T01:40:57.04 0.1 undecidable manual P 259 14.7741 126 0.33 96
IV.FIAM.HHZ. 2021-04-07T01:40:56.99 0.1 undecidable manual P 93 15.7731 124 0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FIAM.HHN. ML:1.5 0.00027384779999999997 0.34 AML other m 2021-04-07T01:41:01.06
IV.FIAM.HHE. ML:1.4 0.0002175 0.38 AML other m 2021-04-07T01:41:01.20
IV.RM33.EHN. ML:1.8 0.00023 1.28 AML other m 2021-04-07T01:41:04.29
IV.ARRO.EHN. ML:2.0 0.0003795 1.06 AML other m 2021-04-07T01:41:05.28
IV.RM33.EHE. ML:1.9 0.000332 0.9 AML other m 2021-04-07T01:41:05.31
IV.ARRO.EHE. ML:1.9 0.000314 0.56 AML other m 2021-04-07T01:41:05.17
IV.CERT.HHN. ML:1.9 0.00029900000000000006 0.34 AML other m 2021-04-07T01:41:05.98
IV.SRES.HHE. ML:1.3 0.000091265065 0.32 AML other m 2021-04-07T01:41:06.07
IV.CERT.HHE. ML:1.6 0.000134 1.48 AML other m 2021-04-07T01:41:06.81
IV.SRES.HHN. ML:1.4 0.0001172 0.32 AML other m 2021-04-07T01:41:06.06
IV.LNSS.HHE. ML:1.7 0.00020630199 0.14 AML other m 2021-04-07T01:41:06.42
IV.LNSS.HHN. ML:1.7 0.00019112715000000003 0.12 AML other m 2021-04-07T01:41:06.41
IV.GAVE.EHN. ML:2.0 0.0003179999999999999 1.2 AML other m 2021-04-07T01:41:09.90
IV.GAVE.EHE. ML:2.2 0.00041049999999999995 0.2 AML other m 2021-04-07T01:41:10.12
IV.SMA1.EHN. ML:1.8 0.000177 0.34 AML other m 2021-04-07T01:41:13.34
IV.NRCA.HHE. ML:2.0 0.0001785 0.12 AML other m 2021-04-07T01:41:14.67
IV.SMA1.EHE. ML:1.8 0.000138953505 0.4 AML other m 2021-04-07T01:41:12.69
IV.NRCA.HHN. ML:1.8 0.0001235 0.68 AML other m 2021-04-07T01:41:16.61
IV.RCAV.EHN. ML:1.6 0.00010730391000000001 0.2 AML other m 2021-04-07T01:41:11.93
IV.RCAV.EHE. ML:1.6 0.00010527059 0.22 AML other m 2021-04-07T01:41:10.19
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