Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 16-05-2020 and time 04:22:16 (UTC) in region 3 km E San Lorenzo Nuovo (VT)

A magnitude ML 1.1 earthquake occured in region: 3 km E San Lorenzo Nuovo (VT), on

  • 16-05-2020 04:22:16 (UTC)
  • 16-05-2020 06:22:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6830, 11.9470 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 3 2091 2091
Castel Giorgio TR 4 2131 4222
Bolsena VT 5 3991 8213
Grotte di Castro VT 6 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 11 836 22524
Proceno VT 13 557 23081
Porano TR 13 1966 25047
Bagnoregio VT 14 3650 28697
Orvieto TR 14 20630 49327
Lubriano VT 14 909 50236
Allerona TR 15 1794 52030
Capodimonte VT 15 1731 53761
Valentano VT 16 2868 56629
Marta VT 16 3499 60128
Montefiascone VT 18 13432 73560
Sorano GR 19 3428 76988
Ficulle TR 20 1669 78657

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 E of Grosseto (82087 inhabitants)
69 Km W of Foligno (57155 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 1.1 2020-05-16
04:22:16		 42.6827 11.9467 10 2020-11-19
12:36:59		 Bollettino Sismico Italiano INGV 82449401
Reviewed
Rev100 		ML 1.3 2020-05-16
04:22:16		 42.6763 11.9562 11 2020-05-16
04:29:36		 Sala Sismica INGV-Roma 79189611
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-05-16 04:22:16 ± 0.09
Latitude 42.6827 ± 0.0045
Longitude 11.9467 ± 0.0061
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 82449401

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 440
Semi-minor axis of confidence ellipse (meter) 418
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 356
Circular confidence region, given by single value of horizontal uncertainty (meter) 440.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 95
Number of associated phases, regardless of their use for origin computation 37
Number of defining phases 29
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) 0.61963
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 17
Type of magnitude ML
Reference to an origin 82449401
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-08-29 21:43:37

ML:1.3

Field Value
Value 1.3
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 79189611
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-05-16 04:29:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BRMO.HHZ. 2020-05-16T04:24:04.18 3.0 undecidable manual Sn -1.88 0
XK.SELL.HHZ. 2020-05-16T04:23:35.27 3.0 positive manual Pn -1.12 0
IV.SARZ.HHZ. 2020-05-16T04:23:17.64 3.0 negative manual Pg 10.94 0
IV.MNTT.EHZ. 2020-05-16T04:23:02.07 3.0 undecidable manual S -0.46 0
IV.ROSPO.HHZ. 2020-05-16T04:22:58.43 3.0 negative manual Pg 1.75 0
IV.LPEL.HNZ. 2020-05-16T04:22:51.73 3.0 positive manual Pg 1.51 0
IV.RMP.HHZ. 2020-05-16T04:22:46.86 3.0 undecidable manual S -9.99 0
IV.CSNT.HHZ. 2020-05-16T04:22:45.94 3.0 undecidable manual S -3.72 0
IV.TOLF.HHN. 2020-05-16T04:22:38.02 0.6 undecidable manual S 176 68.7756 50 0.62 40
IV.MOMA.HNZ. 2020-05-16T04:22:33.41 0.6 undecidable manual S 75 52.503 50 0.34 45
IV.BARO.EHZ. 2020-05-16T04:22:31.79 0.6 undecidable manual S 170 49.0176 50 -0.33 45
IV.ARCI.HHZ. 2020-05-16T04:22:31.36 0.6 undecidable manual S 296 42.7239 50 0.91 37
IV.ATTE.HHZ. 2020-05-16T04:22:28.38 0.1 negative manual P 30 65.9895 50 0.3 88
TV.SF01.EHZ. 2020-05-16T04:22:28.40 0.6 undecidable manual S 295 34.3434 50 0.19 48
IV.TOLF.HHN. 2020-05-16T04:22:28.17 0.6 undecidable manual P 176 68.7756 50 -0.33 43
TV.SF13.HHN. 2020-05-16T04:22:27.15 0.6 undecidable manual S 300 30.6471 50 -0.06 49
TV.SF11.HHZ. 2020-05-16T04:22:26.58 0.6 undecidable manual S 314 30.0477 50 -0.47 45
TV.SF14.HHN. 2020-05-16T04:22:26.35 0.6 undecidable manual S 287 28.2495 50 -0.23 48
IV.MGAB.HHZ. 2020-05-16T04:22:26.64 0.6 undecidable manual S 28 28.8489 50 -0.1 49
IV.MOMA.HNZ. 2020-05-16T04:22:26.19 0.3 undecidable manual P 75 52.503 50 0.19 69
TV.SF04.EHZ. 2020-05-16T04:22:26.60 0.3 undecidable manual S 306 28.8489 50 -0.14 73
IV.MCIV.CHE. 2020-05-16T04:22:25.26 0.6 undecidable manual S 296 24.4533 112 -0.25 48
TV.SF03.EHN. 2020-05-16T04:22:25.62 0.6 undecidable manual S 302 25.0527 112 -0.1 49
IV.BARO.EHZ. 2020-05-16T04:22:25.04 0.3 undecidable manual P 170 49.0176 50 -0.41 66
IV.ARCI.HHZ. 2020-05-16T04:22:24.60 0.3 undecidable manual P 296 42.7239 50 0.11 71
IV.SACS.HHZ. 2020-05-16T04:22:23.87 0.3 undecidable manual S 351 18.6702 118 0.17 74
TV.SF01.EHZ. 2020-05-16T04:22:23.76 0.3 undecidable manual P 295 34.3434 50 0.56 65
IV.LATE.HHZ. 2020-05-16T04:22:22.29 0.3 undecidable manual S 237 13.9749 126 0 77
TV.SF04.EHZ. 2020-05-16T04:22:22.12 0.3 undecidable manual P 306 28.8489 50 -0.23 71
TV.SF11.HHZ. 2020-05-16T04:22:22.54 0.3 undecidable manual P 314 30.0477 50 0.01 74
TV.SF14.HHN. 2020-05-16T04:22:22.27 0.3 undecidable manual P 287 28.2495 50 0.02 75
TV.SF13.HHN. 2020-05-16T04:22:22.59 0.3 undecidable manual P 300 30.6471 50 -0.03 74
IV.MGAB.HHZ. 2020-05-16T04:22:21.79 0.1 positive manual P 28 28.8489 50 -0.56 88
TV.SF03.EHN. 2020-05-16T04:22:21.84 0.3 undecidable manual P 302 25.0527 112 0.08 74
IV.MCIV.CHE. 2020-05-16T04:22:21.62 0.3 undecidable manual P 296 24.4533 112 -0.02 75
IV.SACS.HHZ. 2020-05-16T04:22:20.52 0.1 positive manual P 351 18.6702 118 -0.07 100
IV.LATE.HHZ. 2020-05-16T04:22:19.90 0.1 positive manual P 237 13.9749 126 0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SACS.HHE. ML:1.4 0.000188 0.52 AML other m 2020-05-16T04:22:24.42
IV.SACS.HHN. ML:1.1 0.0000882 0.66 AML other m 2020-05-16T04:22:24.60
IV.LATE.HHE. ML:1.2 0.000145 0.36 AML other m 2020-05-16T04:22:25.66
IV.LATE.HHN. ML:1.4 0.000254 1.36 AML other m 2020-05-16T04:22:26.99
IV.MGAB.HHE. ML:1.2 0.0000791 0.7 AML other m 2020-05-16T04:22:28.62
IV.MGAB.HNN. ML:1.2 0.0000808 0.92 AML other m 2020-05-16T04:22:28.69
IV.SACS.HNE. ML:1.3 0.00016039287499999998 0.1792 AML other m 2020-05-16T04:22:24.43
IV.MGAB.HHN. ML:1.2 0.00008438633 0.1216 AML other m 2020-05-16T04:22:28.62
IV.MGAB.HNE. ML:1.3 0.00009529550000000001 0.4 AML other m 2020-05-16T04:22:27.63
TV.SF04.EHN. ML:1.2 0.00008066593999999999 0.16 AML other m 2020-05-16T04:22:27.51
TV.SF04.EHE. ML:1.2 0.00007285662499999999 0.16 AML other m 2020-05-16T04:22:27.62
TV.SF01.EHN. ML:0.9 0.00003322489 0.1792 AML other m 2020-05-16T04:22:29.67
TV.SF01.EHE. ML:0.9 0.000030612475 0.4608 AML other m 2020-05-16T04:22:34.52
IV.BARO.EHN. ML:0.9 0.000022398403 0.3392 AML other m 2020-05-16T04:22:35.25
IV.BARO.EHE. ML:1.0 0.000024420628 0.4192 AML other m 2020-05-16T04:22:35.94
IV.ATTE.HHE. ML:1.0 0.00001788744 0.3424 AML other m 2020-05-16T04:22:40.79
IV.ATTE.HHN. ML:0.9 0.000016634784999999998 0.4 AML other m 2020-05-16T04:22:42.32
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