Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 24-04-2019 and time 10:18:55 (UTC) in region 2 km S Calcata (VT)

A magnitude ML 1.7 earthquake occured in region: 2 km S Calcata (VT), on

  • 24-04-2019 10:18:55 (UTC)
  • 24-04-2019 12:18:55 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.2040, 12.4240 at 6 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
Calcata VT 2 918 918
Mazzano Romano RM 2 3165 4083
Faleria VT 3 2179 6262
Rignano Flaminio RM 5 10277 16539
Magliano Romano RM 5 1448 17987
Castel Sant'Elia VT 7 2683 20670
Nepi VT 8 9687 30357
Campagnano di Roma RM 8 11571 41928
Sant'Oreste RM 9 3687 45615
Monterosi VT 9 4448 50063
Morlupo RM 10 8696 58759
Civita Castellana VT 10 16491 75250
Castelnuovo di Porto RM 11 8630 83880
Sacrofano RM 11 7740 91620
Capena RM 12 10592 102212
Civitella San Paolo RM 13 2066 104278
Ponzano Romano RM 14 1155 105433
Formello RM 14 12918 118351
Fiano Romano RM 14 15360 133711
Nazzano RM 15 1436 135147
Riano RM 15 10466 145613
Filacciano RM 16 477 146090
Trevignano Romano RM 16 5725 151815
Stimigliano RI 16 2328 154143
Torrita Tiberina RM 16 1089 155232
Corchiano VT 17 3869 159101
Sutri VT 17 6709 165810
Forano RI 18 3179 168989
Anguillara Sabazia RM 18 19357 188346
Fabrica di Roma VT 18 8340 196686
Collevecchio RI 18 1577 198263
Magliano Sabina RI 18 3774 202037
Gallese VT 19 2849 204886
Bassano Romano VT 19 5000 209886
Carbognano VT 19 1995 211881
Ronciglione VT 20 8669 220550

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km NW of Guidonia Montecelio (88673 inhabitants)
35 Km N of Roma (2864731 inhabitants)
35 Km SE of Viterbo (67173 inhabitants)
41 Km NW of Tivoli (56533 inhabitants)
44 Km SW of Terni (111501 inhabitants)
50 Km NE of Fiumicino (78395 inhabitants)
53 Km E of Civitavecchia (52991 inhabitants)
60 Km N of Pomezia (62966 inhabitants)
65 Km NW of Velletri (53303 inhabitants)
70 Km N of Aprilia (73446 inhabitants)
82 Km W of L'Aquila (69753 inhabitants)
86 Km N of Anzio (54211 inhabitants)
87 Km S of Foligno (57155 inhabitants)
91 Km NW of Latina (125985 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 1.7 2019-04-24
10:18:55		 42.2043 12.4242 7 2019-08-22
08:24:57		 Bollettino Sismico Italiano INGV 67924981
Reviewed
Rev100 		ML 1.7 2019-04-24
10:18:55		 42.2028 12.4152 6 2019-04-24
12:42:59		 Sala Sismica INGV-Roma 67921811
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-04-24 10:18:55 ± 0.06
Latitude 42.2043 ± 0.0036
Longitude 12.4242 ± 0.0036
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 67924981

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 364
Semi-minor axis of confidence ellipse (meter) 266
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 207
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) 113
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.24372
Epicentral distance of station farthest from the epicenter (degree) 0.65830
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 67921811
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-04-24 12:42:59

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 67924981
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-07-01 08:58:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RM33.EHZ. 2019-04-24T10:19:18.78 0.6 undecidable manual S 62 73.0713 50 0.41 43
IV.LATE.HHE. 2019-04-24T10:19:17.12 0.6 undecidable manual S 312 68.1762 50 0.07 47
IV.GAVE.EHZ. 2019-04-24T10:19:16.55 0.6 undecidable manual S 35 66.378 50 -0.04 47
IV.MOMA.HHZ. 2019-04-24T10:19:16.90 0.6 undecidable manual S 10 67.5768 50 0 48
IV.RCAV.EHE. 2019-04-24T10:19:14.48 0.6 undecidable manual S 133 58.3971 50 0.02 48
IV.CERT.HHE. 2019-04-24T10:19:13.44 0.6 undecidable manual S 121 53.9016 50 0.18 47
IV.ARRO.EHZ. 2019-04-24T10:19:11.98 0.6 undecidable manual S 34 50.1165 50 -0.26 47
IV.CESX.HHE. 2019-04-24T10:19:10.87 0.6 undecidable manual S 16 46.7199 50 -0.48 45
IV.TOLF.HHE. 2019-04-24T10:19:08.66 0.6 undecidable manual S 246 38.2284 100 -0.17 49
IV.RM33.EHZ. 2019-04-24T10:19:08.21 0.3 undecidable manual P 62 73.0713 50 -0.44 64
IV.LATE.HHE. 2019-04-24T10:19:08.29 0.6 undecidable manual P 312 68.1762 50 0.4 44
IV.MOMA.HHZ. 2019-04-24T10:19:07.71 0.3 undecidable manual P 10 67.5768 50 -0.1 70
IV.GAVE.EHZ. 2019-04-24T10:19:07.77 0.3 undecidable manual P 35 66.378 50 0.14 70
IV.BARO.EHE. 2019-04-24T10:19:06.38 0.3 undecidable manual S 279 31.0467 102 0 76
IV.RCAV.EHE. 2019-04-24T10:19:06.49 0.3 undecidable manual P 133 58.3971 50 0.09 71
IV.MTCE.HHE. 2019-04-24T10:19:06.85 0.3 undecidable manual S 127 33.0447 101 -0.22 73
IV.CERT.HHE. 2019-04-24T10:19:05.57 0.3 undecidable manual P 121 53.9016 50 -0.14 71
IV.ARRO.EHZ. 2019-04-24T10:19:05.42 0.6 undecidable manual P 34 50.1165 50 0.3 46
IT.MMP1.HGE. 2019-04-24T10:19:05.49 1.0 undecidable manual S 79 27.0507 103 0.44 23
IV.CESX.HHE. 2019-04-24T10:19:04.64 0.3 undecidable manual P 16 46.7199 50 0.04 74
IV.TOLF.HHE. 2019-04-24T10:19:03.02 0.6 undecidable manual P 246 38.2284 100 -0.13 49
IV.MTCE.HHE. 2019-04-24T10:19:02.25 0.3 undecidable manual P 127 33.0447 101 0.12 74
IV.BARO.EHE. 2019-04-24T10:19:01.83 0.1 undecidable manual P 279 31.0467 102 0.09 100
IT.MMP1.HGE. 2019-04-24T10:19:00.96 0.3 undecidable manual P 79 27.0507 103 -0.01 77
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARRO.EHN. ML:1.6 0.0001075 0.22 AML other m 2019-04-24T10:19:14.82
IV.ARRO.EHE. ML:1.6 0.00009275 0.64 AML other m 2019-04-24T10:19:15.56
IV.GAVE.EHE. ML:2.0 0.0001725 0.18 AML other m 2019-04-24T10:19:17.99
IV.GAVE.EHN. ML:1.9 0.000157 0.36 AML other m 2019-04-24T10:19:18.46
IV.MOMA.HNN. ML:1.8 0.00011831371 0.1888 AML other m 2019-04-24T10:19:18.76
IV.MOMA.HHE. ML:1.7 0.0000789 0.74 AML other m 2019-04-24T10:19:18.54
IV.MOMA.HNE. ML:1.8 0.00011937400000000001 0.8 AML other m 2019-04-24T10:19:19.41
IV.RM33.EHN. ML:1.3 0.00003154957 0.2816 AML other m 2019-04-24T10:19:19.92
IV.MOMA.HHN. ML:1.7 0.00008015 0.7 AML other m 2019-04-24T10:19:20.33
IV.RM33.EHE. ML:1.5 0.000050077245 0.256 AML other m 2019-04-24T10:19:20.79
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