Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 22-05-2020 and time 03:59:14 (UTC) in region 4 km E San Lorenzo Nuovo (VT)

A magnitude ML 1.8 earthquake occured in region: 4 km E San Lorenzo Nuovo (VT), on

  • 22-05-2020 03:59:14 (UTC)
  • 22-05-2020 05:59:14 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6840, 11.9510 at 10 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
San Lorenzo Nuovo VT 4 2091 2091
Castel Giorgio TR 4 2131 4222
Bolsena VT 5 3991 8213
Grotte di Castro VT 7 2683 10896
Gradoli VT 9 1353 12249
Castel Viscardo TR 9 2938 15187
Acquapendente VT 10 5506 20693
Onano VT 11 995 21688
Latera VT 12 836 22524
Porano TR 12 1966 24490
Proceno VT 13 557 25047
Orvieto TR 14 20630 45677
Bagnoregio VT 14 3650 49327
Lubriano VT 14 909 50236
Allerona TR 15 1794 52030
Capodimonte VT 15 1731 53761
Valentano VT 17 2868 56629
Marta VT 17 3499 60128
Montefiascone VT 17 13432 73560
Sorano GR 19 3428 76988
Ficulle TR 20 1669 78657
Celleno VT 20 1355 80012

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km NW of Viterbo (67173 inhabitants)
59 Km W of Terni (111501 inhabitants)
59 Km SW of Perugia (166134 inhabitants)
67 Km N of Civitavecchia (52991 inhabitants)
69 Km W of Foligno (57155 inhabitants)
69 Km E of Grosseto (82087 inhabitants)
87 Km SE of Siena (53903 inhabitants)
87 Km S of Arezzo (99543 inhabitants)
98 Km NW of Roma (2864731 inhabitants)
99 Km NW of Guidonia Montecelio (88673 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 2020-05-22
03:59:14		 42.6838 11.9508 10 2020-11-19
12:36:46		 Bollettino Sismico Italiano INGV 79607121
Reviewed
Rev100 		ML 1.8 2020-05-22
03:59:14		 42.6877 11.9595 10 2020-05-22
04:20:18		 Sala Sismica INGV-Roma 79430641
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-05-22 03:59:14 ± 0.11
Latitude 42.6838 ± 0.0054
Longitude 11.9508 ± 0.0061
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 79607121

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 574
Semi-minor axis of confidence ellipse (meter) 126
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 358
Circular confidence region, given by single value of horizontal uncertainty (meter) 570.0
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 45
Number of defining phases 45
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) 0.12860
Epicentral distance of station farthest from the epicenter (degree) 0.96677
Number of stations at which the event was observed 33
Number of stations from which data was used for origin computation 33
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 27
Type of magnitude ML
Reference to an origin 79607121
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-09-10 21:33:18

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 79430641
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-05-22 04:20:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SSFR.HHZ. 2020-05-22T03:59:33.10 0.3 undecidable manual P 39 107.3148 50 0.78 51
IV.ATSC.EHZ. 2020-05-22T03:59:32.26 0.6 undecidable manual P 36 101.5206 50 0.83 34
IV.MTCE.HHZ. 2020-05-22T03:59:31.62 0.6 undecidable manual P 138 97.9242 50 0.74 35
IV.ATBU.EHZ. 2020-05-22T03:59:31.66 0.3 undecidable manual P 29 100.3218 50 0.41 59
IV.MOMA.HHZ. 2020-05-22T03:59:30.90 0.6 undecidable manual S 75 52.2033 50 0.08 46
IV.ATPC.HHE. 2020-05-22T03:59:30.98 0.3 undecidable manual P 25 97.4247 50 0.17 62
IV.CASP.HHZ. 2020-05-22T03:59:30.40 0.3 undecidable manual P 278 89.244 50 0.86 51
IV.TB03.DH2.01 2020-05-22T03:59:29.37 0.3 undecidable manual P 25 87.8454 50 0.04 65
IV.ATPI.EHZ. 2020-05-22T03:59:29.79 0.6 undecidable manual P 23 92.6406 50 -0.27 41
IV.BARO.EHZ. 2020-05-22T03:59:29.57 0.3 undecidable manual S 170 49.0176 50 -0.42 65
IV.TB02.DHZ.01 2020-05-22T03:59:29.32 0.6 undecidable manual P 26 84.7485 50 0.47 40
IV.TB01.DHE.01 2020-05-22T03:59:28.97 0.6 undecidable manual P 27 86.8464 50 -0.2 42
IV.ATMI.HHZ. 2020-05-22T03:59:28.57 0.3 undecidable manual P 20 76.5678 50 0.98 50
IV.ATVO.HNN. 2020-05-22T03:59:28.96 0.1 negative manual P 25 85.8474 50 -0.06 87
IV.CESI.HHZ. 2020-05-22T03:59:28.66 0.3 undecidable manual P 65 85.3479 50 -0.29 62
IV.ARCI.HHZ. 2020-05-22T03:59:28.88 0.6 undecidable manual S 296 43.0236 50 0.51 43
IV.MAON.HHZ. 2020-05-22T03:59:28.56 0.6 undecidable manual P 247 72.7716 50 1.56 24
IV.ATLO.EHZ. 2020-05-22T03:59:27.99 0.3 undecidable manual P 28 79.2651 50 -0.01 67
IV.MURB.HHZ. 2020-05-22T03:59:27.92 0.3 undecidable manual P 36 79.365 50 -0.1 65
IV.TOLF.HHZ. 2020-05-22T03:59:26.14 0.3 undecidable manual P 177 68.8755 50 -0.26 65
TV.SF01.EHZ. 2020-05-22T03:59:26.21 0.6 undecidable manual S 294 34.6431 50 0.07 48
IV.ARRO.EHZ. 2020-05-22T03:59:26.41 0.6 undecidable manual P 100 67.4769 50 0.22 44
IV.ASSB.HHE. 2020-05-22T03:59:26.74 0.6 undecidable manual P 55 69.9744 50 0.17 44
IV.ATTE.HHZ. 2020-05-22T03:59:25.89 0.3 undecidable manual P 30 65.7897 50 -0.03 68
TV.SF13.HHZ. 2020-05-22T03:59:25.02 0.6 undecidable manual S 299 30.8469 50 -0.11 48
TV.SF11.HHN. 2020-05-22T03:59:24.50 0.6 undecidable manual S 313 30.1476 50 -0.45 44
TV.SF14.HHN. 2020-05-22T03:59:24.05 0.6 undecidable manual S 286 28.5492 50 -0.46 44
TV.SF04.EHZ. 2020-05-22T03:59:24.57 0.3 undecidable manual S 306 29.0487 50 -0.08 72
IV.CESX.HHZ. 2020-05-22T03:59:24.34 0.3 undecidable manual P 99 52.503 50 0.45 64
IV.MGAB.HHZ. 2020-05-22T03:59:24.05 0.6 undecidable manual S 27 28.5492 50 -0.48 44
TV.SF03.EHN. 2020-05-22T03:59:23.52 0.6 undecidable manual S 302 25.3524 50 -0.14 48
IV.MOMA.HHZ. 2020-05-22T03:59:23.47 0.3 undecidable manual P 75 52.2033 50 -0.36 65
IV.ARCI.HHZ. 2020-05-22T03:59:22.80 0.3 undecidable manual P 296 43.0236 50 0.39 66
IV.BARO.EHZ. 2020-05-22T03:59:22.75 0.1 undecidable manual P 170 49.0176 50 -0.6 82
IV.SACS.HHZ. 2020-05-22T03:59:21.59 0.3 undecidable manual S 350 18.6702 119 -0.09 73
TV.SF01.EHZ. 2020-05-22T03:59:21.48 0.3 undecidable manual P 294 34.6431 50 0.35 67
TV.SF11.HHN. 2020-05-22T03:59:20.38 0.3 undecidable manual P 313 30.1476 50 -0.06 72
TV.SF14.HHN. 2020-05-22T03:59:20.08 0.1 undecidable manual P 286 28.5492 50 -0.11 96
TV.SF04.EHZ. 2020-05-22T03:59:20.06 0.1 undecidable manual P 306 29.0487 50 -0.21 94
IV.LATE.HHZ. 2020-05-22T03:59:20.59 0.6 undecidable manual S 237 14.2746 126 0.19 48
TV.SF13.HHZ. 2020-05-22T03:59:20.43 0.1 undecidable manual P 299 30.8469 50 -0.12 95
IV.MGAB.HHZ. 2020-05-22T03:59:19.36 0.1 positive manual P 27 28.5492 50 -0.83 77
TV.SF03.EHN. 2020-05-22T03:59:19.55 0.1 undecidable manual P 302 25.3524 50 -0.14 96
IV.SACS.HHZ. 2020-05-22T03:59:18.17 0.1 positive manual P 350 18.6702 119 -0.38 92
IV.LATE.HHZ. 2020-05-22T03:59:17.80 0.1 positive manual P 237 14.2746 126 -0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MGAB.HNE. ML:0.0 0.0003188379 0.16 AML other m 2020-05-22T03:59:26.80
IV.MGAB.HHE. ML:0.0 0.00034697775 0.3008 AML other m 2020-05-22T03:59:26.37
IV.MGAB.HNN. ML:0.0 0.00042233195 0.24 AML other m 2020-05-22T03:59:25.63
IV.MGAB.HHN. ML:0.0 0.0004430438 0.24 AML other m 2020-05-22T03:59:25.63
IV.LATE.HHN. ML:2.0 0.00098161215 0.2208 AML other m 2020-05-22T03:59:23.51
IV.LATE.HHE. ML:1.8 0.0006617465 0.2816 AML other m 2020-05-22T03:59:21.71
IV.SACS.HHE. ML:2.1 0.00101721505 0.24 AML other m 2020-05-22T03:59:21.95
IV.SACS.HNN. ML:1.9 0.00063555995 0.2784 AML other m 2020-05-22T03:59:22.35
IV.SACS.HHN. ML:1.9 0.0006672691 0.2784 AML other m 2020-05-22T03:59:22.35
IV.SACS.HNE. ML:2.1 0.0010543909999999998 0.2304 AML other m 2020-05-22T03:59:21.95
TV.SF04.EHN. ML:1.8 0.00035688365 0.1792 AML other m 2020-05-22T03:59:27.67
TV.SF04.EHE. ML:1.6 0.0001777844 0.2624 AML other m 2020-05-22T03:59:27.99
TV.SF01.EHN. ML:1.7 0.00022479194999999998 0.24 AML other m 2020-05-22T03:59:28.76
TV.SF01.EHE. ML:1.4 0.00011716206500000001 0.3392 AML other m 2020-05-22T03:59:29.16
IV.BARO.EHN. ML:1.7 0.000127592115 0.2208 AML other m 2020-05-22T03:59:31.60
IV.BARO.EHE. ML:1.6 0.000119574285 0.3008 AML other m 2020-05-22T03:59:31.58
IV.BARO.HNE. ML:1.9 0.0001929591 0.3616 AML other m 2020-05-22T03:59:31.41
IV.ARCI.HHN. ML:1.0 0.000036270195 0.1984 AML other m 2020-05-22T03:59:32.47
IV.ARCI.HHE. ML:1.0 0.000029301215 0.1792 AML other m 2020-05-22T03:59:30.92
IV.ATTE.HHE. ML:1.6 0.00007320591499999999 0.32 AML other m 2020-05-22T03:59:38.13
IV.ATTE.HHN. ML:1.6 0.00008121426500000001 0.2624 AML other m 2020-05-22T03:59:38.11
IV.ARRO.EHN. ML:1.5 0.000052562525 0.3008 AML other m 2020-05-22T03:59:41.01
IV.ARRO.EHE. ML:1.3 0.000035031834999999995 0.2624 AML other m 2020-05-22T03:59:38.25
IV.MURB.HNE. ML:2.4 0.0003825737 0.4 AML other m 2020-05-22T03:59:43.82
IV.MURB.HHN. ML:2.4 0.0003538137 0.3008 AML other m 2020-05-22T03:59:44.83
IV.MURB.HHE. ML:2.4 0.00038670835000000005 0.4 AML other m 2020-05-22T03:59:43.81
IV.MURB.HNN. ML:2.4 0.00035802495 0.3328 AML other m 2020-05-22T03:59:44.84
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