Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 16-05-2020 and time 18:48:02 (Italy) in region 4 km NW Bolsena (VT)

A magnitude ML 1.4 earthquake occured in region: 4 km NW Bolsena (VT), on

  • 16-05-2020 16:48:02 (UTC)
  • 16-05-2020 18:48:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6730, 11.9600 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
Bolsena VT 4 3991 3991
Castel Giorgio TR 4 2131 6122
San Lorenzo Nuovo VT 5 2091 8213
Grotte di Castro VT 7 2683 10896
Gradoli VT 9 1353 12249
Castel Viscardo TR 10 2938 15187
Acquapendente VT 11 5506 20693
Porano TR 12 1966 22659
Latera VT 12 836 23495
Onano VT 12 995 24490
Bagnoregio VT 13 3650 28140
Lubriano VT 13 909 29049
Orvieto TR 13 20630 49679
Proceno VT 14 557 50236
Capodimonte VT 14 1731 51967
Marta VT 16 3499 55466
Allerona TR 16 1794 57260
Montefiascone VT 16 13432 70692
Valentano VT 16 2868 73560
Celleno VT 19 1355 74915

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km NW of Viterbo (67173 inhabitants)
58 Km W of Terni (111501 inhabitants)
60 Km SW of Perugia (166134 inhabitants)
66 Km N of Civitavecchia (52991 inhabitants)
69 Km W of Foligno (57155 inhabitants)
70 Km E of Grosseto (82087 inhabitants)
88 Km SE of Siena (53903 inhabitants)
89 Km S of Arezzo (99543 inhabitants)
97 Km NW of Roma (2864731 inhabitants)
98 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 1.4 2020-05-16
16:48:02		 42.6728 11.9595 10 2020-11-19
12:37:00		 Bollettino Sismico Italiano INGV 82714711
Reviewed
Rev100 		ML 1.5 2020-05-16
16:48:02		 42.6738 11.9652 11 2020-05-16
16:57:28		 Sala Sismica INGV-Roma 79205991
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-05-16 16:48:02 ± 0.12
Latitude 42.6728 ± 0.0054
Longitude 11.9595 ± 0.0073
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 82714711

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 546
Semi-minor axis of confidence ellipse (meter) 314
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 196
Circular confidence region, given by single value of horizontal uncertainty (meter) 550.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 98
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.78061
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 82714711
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-09-07 17:17:18

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 79205991
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-05-16 16:57:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ILOS.HHZ. 2020-05-16T16:49:35.95 3.0 undecidable manual Pg 17.15 0
IV.TDS.HHZ. 2020-05-16T16:49:18.28 3.0 undecidable manual Pn 5.47 0
GU.CANO.HHZ. 2020-05-16T16:49:14.23 3.0 undecidable manual Sn -0.35 0
IV.MBAL.EHZ. 2020-05-16T16:49:06.95 3.0 undecidable manual Sn 0.01 0
IV.VVLD.HHZ. 2020-05-16T16:49:00.05 3.0 undecidable manual Sn 0.71 0
IV.IFOR.HHZ. 2020-05-16T16:48:56.90 3.0 positive manual Pg 11.07 0
IV.MF5.EHZ. 2020-05-16T16:48:20.05 3.0 undecidable manual P -0.88 0
IV.MOMA.HNZ. 2020-05-16T16:48:19.91 0.6 undecidable manual S 73 51.8037 50 0.73 39
IV.ATVO.HHZ. 2020-05-16T16:48:18.61 1.0 undecidable manual P 25 86.6466 50 1.02 16
IV.ARCI.HHZ. 2020-05-16T16:48:17.79 0.6 undecidable manual S 297 44.1225 50 0.65 41
IV.BARO.HNZ. 2020-05-16T16:48:17.83 0.3 undecidable manual S 171 47.7189 50 -0.26 68
IV.ATCC.EHE. 2020-05-16T16:48:16.41 0.3 undecidable manual P 44 79.2651 50 -0.04 67
TV.SF01.EHZ. 2020-05-16T16:48:14.88 0.6 undecidable manual S 296 35.742 50 -0.02 49
IV.ATTE.HHZ. 2020-05-16T16:48:14.86 0.1 undecidable manual P 29 66.4779 50 0.38 86
TV.SF11.HHZ. 2020-05-16T16:48:13.51 0.6 undecidable manual S 314 31.5462 50 -0.25 47
TV.SF14.HHN. 2020-05-16T16:48:13.12 0.6 undecidable manual S 288 29.5482 50 -0.12 48
TV.SF13.HHN. 2020-05-16T16:48:13.79 0.6 undecidable manual S 300 32.0457 50 -0.12 48
TV.SF04.EHZ. 2020-05-16T16:48:13.13 0.6 undecidable manual S 307 30.3474 50 -0.32 46
TV.SF03.EHZ. 2020-05-16T16:48:12.00 0.6 undecidable manual S 303 26.5512 50 -0.44 45
IV.MGAB.HHZ. 2020-05-16T16:48:12.86 0.6 undecidable manual S 25 29.3484 50 -0.33 46
IV.MOMA.HNZ. 2020-05-16T16:48:12.34 0.3 undecidable manual P 73 51.8037 50 0.12 70
IV.BARO.HNZ. 2020-05-16T16:48:11.19 0.1 undecidable manual P 171 47.7189 50 -0.4 88
IV.ARCI.HHZ. 2020-05-16T16:48:11.80 0.1 undecidable manual P 297 44.1225 50 0.76 78
IV.MCIV.CHZ. 2020-05-16T16:48:11.96 0.6 undecidable manual S 297 25.8519 50 -0.3 47
IV.SACS.HHZ. 2020-05-16T16:48:10.38 0.3 undecidable manual S 348 19.9689 117 -0.13 74
TV.SF01.EHZ. 2020-05-16T16:48:10.36 0.3 undecidable manual P 296 35.742 50 0.61 63
TV.SF13.HHN. 2020-05-16T16:48:09.73 0.3 undecidable manual P 300 32.0457 50 0.55 65
IV.LATE.HHZ. 2020-05-16T16:48:08.87 0.6 undecidable manual S 243 14.2746 126 0.05 50
IV.MGAB.HHZ. 2020-05-16T16:48:08.20 0.1 positive manual P 25 29.3484 50 -0.56 87
TV.SF04.EHZ. 2020-05-16T16:48:08.67 0.3 undecidable manual P 307 30.3474 50 -0.24 71
TV.SF03.EHZ. 2020-05-16T16:48:08.30 0.3 undecidable manual P 303 26.5512 50 -0.03 74
TV.SF11.HHZ. 2020-05-16T16:48:08.96 0.3 undecidable manual P 314 31.5462 50 -0.14 72
TV.SF14.HHN. 2020-05-16T16:48:08.78 0.1 undecidable manual P 288 29.5482 50 -0.01 99
IV.MCIV.CHZ. 2020-05-16T16:48:08.24 0.3 undecidable manual P 297 25.8519 50 0.01 75
IV.LATE.HHZ. 2020-05-16T16:48:06.32 0.1 positive manual P 243 14.2746 126 0.08 100
IV.SACS.HHZ. 2020-05-16T16:48:06.98 0.1 positive manual P 348 19.9689 117 -0.23 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SACS.HNN. ML:1.5 0.00024420035 0.2816 AML other m 2020-05-16T16:48:10.71
IV.SACS.HHN. ML:1.5 0.00021902384999999998 0.2688 AML other m 2020-05-16T16:48:10.56
IV.SACS.HNE. ML:1.6 0.00026608055000000005 0.256 AML other m 2020-05-16T16:48:11.22
IV.SACS.HHE. ML:1.6 0.0002794008 0.1664 AML other m 2020-05-16T16:48:11.22
IV.MGAB.HHN. ML:1.6 0.00021799375 0.1664 AML other m 2020-05-16T16:48:14.40
IV.MGAB.HHE. ML:1.5 0.0001485942 0.1536 AML other m 2020-05-16T16:48:15.65
IV.MGAB.HNE. ML:1.4 0.000142050455 0.1792 AML other m 2020-05-16T16:48:15.65
IV.MGAB.HNN. ML:1.6 0.00019156204999999998 0.1408 AML other m 2020-05-16T16:48:14.41
IV.MCIV.CHE. ML:1.0 0.000058110639999999995 0.2816 AML other m 2020-05-16T16:48:14.85
IV.MCIV.CHN. ML:1.1 0.000077167115 0.1408 AML other m 2020-05-16T16:48:13.47
TV.SF04.EHN. ML:1.3 0.00008925783500000001 0.192 AML other m 2020-05-16T16:48:14.93
TV.SF04.EHE. ML:1.3 0.00009465198 0.1792 AML other m 2020-05-16T16:48:15.03
TV.SF01.EHE. ML:1.1 0.000047091265000000005 0.2432 AML other m 2020-05-16T16:48:15.88
TV.SF01.EHN. ML:1.2 0.00005251986 0.1664 AML other m 2020-05-16T16:48:17.46
IV.ATTE.HHE. ML:1.3 0.00003395417 0.32 AML other m 2020-05-16T16:48:27.33
IV.ATTE.HHN. ML:1.4 0.000039761765 0.3328 AML other m 2020-05-16T16:48:26.84
IV.ATMI.HHE. ML:1.7 0.00007202925 0.2944 AML other m 2020-05-16T16:48:31.19
IV.ATMI.HHN. ML:1.6 0.000054874255 0.32 AML other m 2020-05-16T16:48:31.21
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