Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 23-05-2020 and time 06:30:46 (Italy) in region 4 km SW Campello sul Clitunno (PG)

A magnitude ML 1.2 earthquake occured in region: 4 km SW Campello sul Clitunno (PG), on

  • 23-05-2020 04:30:46 (UTC)
  • 23-05-2020 06:30:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7840, 12.7620 at 8 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Campello sul Clitunno PG 4 2442 2442
Spoleto PG 6 38218 40660
Sant'Anatolia di Narco PG 8 564 41224
Vallo di Nera PG 8 364 41588
Castel Ritaldi PG 9 3278 44866
Scheggino PG 10 461 45327
Trevi PG 11 8469 53796
Cerreto di Spoleto PG 13 1075 54871
Montefalco PG 15 5679 60550
Giano dell'Umbria PG 16 3846 64396
Poggiodomo PG 16 117 64513
Sellano PG 18 1079 65592
Ferentillo TR 18 1913 67505
Massa Martana PG 20 3770 71275
Foligno PG 20 57155 128430

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km S of Foligno (57155 inhabitants)
26 Km NE of Terni (111501 inhabitants)
47 Km SE of Perugia (166134 inhabitants)
67 Km NE of Viterbo (67173 inhabitants)
71 Km NW of L'Aquila (69753 inhabitants)
78 Km W of Teramo (54892 inhabitants)
87 Km N of Guidonia Montecelio (88673 inhabitants)
91 Km N of Tivoli (56533 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
Reviewed
Rev100 		ML 1.2 2020-05-23
04:30:46		 42.784 12.7625 9 2020-05-23
04:36:32		 Sala Sismica INGV-Roma 79469531
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-05-23 04:30:46 ± 0.05
Latitude 42.7840 ± 0.0027
Longitude 12.7625 ± 0.0049
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 79469531

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 420
Semi-minor axis of confidence ellipse (meter) 152
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 311
Circular confidence region, given by single value of horizontal uncertainty (meter) 420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 131
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.21764
Epicentral distance of station farthest from the epicenter (degree) 0.44696
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 79469531
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-05-23 04:36:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2020-05-23T04:31:02.51 0.3 undecidable manual S 46 49.617 50 0.16 73
IV.MMO1.EHZ. 2020-05-23T04:31:01.90 0.3 undecidable manual S 74 47.619 50 0.06 75
IV.FDMO.HHZ. 2020-05-23T04:30:59.22 0.3 undecidable manual S 43 38.5281 50 -0.17 74
IV.NRCA.HHZ. 2020-05-23T04:30:56.51 0.3 undecidable manual S 79 29.1486 106 -0.11 76
IV.CESI.HHZ. 2020-05-23T04:30:56.07 0.6 undecidable manual S 25 27.0507 107 0.13 51
IV.RM33.EHZ. 2020-05-23T04:30:55.41 0.1 undecidable manual P 129 47.9187 50 0.2 97
IV.MMO1.EHZ. 2020-05-23T04:30:55.03 0.1 undecidable manual P 74 47.619 50 -0.15 98
IV.CSP1.EHZ. 2020-05-23T04:30:55.42 0.1 undecidable manual P 46 49.617 50 -0.06 99
IV.CESX.HHZ. 2020-05-23T04:30:54.89 0.3 undecidable manual S 216 24.1536 109 -0.09 77
IV.ATCC.EHZ. 2020-05-23T04:30:54.81 0.1 undecidable manual P 347 45.621 50 -0.05 100
IV.FDMO.HHZ. 2020-05-23T04:30:53.72 1.0 negative manual P 43 38.5281 50 -0.05 25
IV.NRCA.HHZ. 2020-05-23T04:30:52.14 0.6 positive manual P 79 29.1486 106 -0.03 52
IV.CESI.HHZ. 2020-05-23T04:30:51.89 0.3 positive manual P 25 27.0507 107 0.12 77
IV.CESX.HHZ. 2020-05-23T04:30:51.43 1.0 positive manual P 216 24.1536 109 0.21 25
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESX.HHE. ML:1.3 0.00012125317000000001 0.5824 AML other m 2020-05-23T04:30:56.47
IV.CESX.HHN. ML:1.2 0.00009646870000000001 0.5376 AML other m 2020-05-23T04:30:56.65
IV.CESI.HNE. ML:1.3 0.00011837494500000001 0.9888 AML other m 2020-05-23T04:31:06.31
IV.CESI.HNN. ML:1.6 0.00019447117 0.9216 AML other m 2020-05-23T04:30:57.08
IV.CESI.HHE. ML:0.9 0.000038970779999999995 0.1408 AML other m 2020-05-23T04:30:56.63
IV.CESI.HHN. ML:1.3 0.00009801868999999999 0.1984 AML other m 2020-05-23T04:30:56.23
IV.NRCA.HHE. ML:1.2 0.00008283097999999999 0.1568 AML other m 2020-05-23T04:30:56.98
IV.NRCA.HHN. ML:1.1 0.000058370359999999997 0.0992 AML other m 2020-05-23T04:30:58.56
IV.NRCA.HNE. ML:1.4 0.000140252115 2.9792 AML other m 2020-05-23T04:30:53.06
IV.NRCA.HNN. ML:1.6 0.00020424429999999999 0.9184 AML other m 2020-05-23T04:30:58.39
IV.FDMO.HHE. ML:1.1 0.000045917465000000006 0.1792 AML other m 2020-05-23T04:30:59.83
IV.FDMO.HHN. ML:0.9 0.000028613435 0.16 AML other m 2020-05-23T04:31:00.16
IV.ATCC.EHE. ML:0.8 0.00002124682 0.16 AML other m 2020-05-23T04:31:02.42
IV.ATCC.EHN. ML:0.8 0.0000201027415 0.7776 AML other m 2020-05-23T04:31:02.78
IV.RM33.EHE. ML:0.7 0.000014586215 0.3424 AML other m 2020-05-23T04:31:05.15
IV.RM33.EHN. ML:0.7 0.000013820890000000001 0.2176 AML other m 2020-05-23T04:31:03.11
IV.RM33.HNE. ML:2.0 0.00026367795 3.312 AML other m 2020-05-23T04:31:08.62
IV.RM33.HNN. ML:1.7 0.00013976865 0.7104 AML other m 2020-05-23T04:31:03.28
IV.CSP1.EHE. ML:1.3 0.000050166519999999996 14.4576 AML other m 2020-05-23T04:31:17.02
IV.CSP1.EHN. ML:1.4 0.000068745575 9.8624 AML other m 2020-05-23T04:30:54.82
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