Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 23-04-2020 and time 01:41:45 (Italy) in region 2 km W Perugia (PG)

A magnitude ML 1.2 earthquake occured in region: 2 km W Perugia (PG), on

  • 22-04-2020 23:41:45 (UTC)
  • 23-04-2020 01:41:45 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.1070, 12.3620 at 10 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
Perugia PG 2 166134 166134
Corciano PG 7 21332 187466
Torgiano PG 11 6725 194191
Magione PG 13 14865 209056
Bettona PG 14 4367 213423
Deruta PG 15 9669 223092
Bastia Umbra PG 16 21874 244966

Municipalities with at least 50000 inhabitants

An earthquake occurred to
2 Km W of Perugia (166134 inhabitants)
33 Km NW of Foligno (57155 inhabitants)
56 Km SE of Arezzo (99543 inhabitants)
65 Km NW of Terni (111501 inhabitants)
79 Km N of Viterbo (67173 inhabitants)
87 Km E of Siena (53903 inhabitants)
98 Km SW of Fano (60888 inhabitants)
100 Km SW of Pesaro (94582 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 2020-04-22
23:41:45		 43.1067 12.3618 10 2020-04-22
23:49:14		 Sala Sismica INGV-Roma 78486691
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-22 23:41:45 ± 0.08
Latitude 43.1067 ± 0.0036
Longitude 12.3618 ± 0.0074
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 78486691

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 506
Semi-minor axis of confidence ellipse (meter) 472
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 308
Circular confidence region, given by single value of horizontal uncertainty (meter) 510.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 119
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.34534
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 23
Type of magnitude ML
Reference to an origin 78486691
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-22 23:49:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MOMA.HHZ. 2020-04-22T23:41:57.90 0.3 undecidable manual S 153 37.629 50 -0.01 73
IV.ATVO.HHZ. 2020-04-22T23:41:56.27 0.6 undecidable manual S 7 30.747 50 0.19 46
IV.MGAB.HHZ. 2020-04-22T23:41:56.08 0.3 undecidable manual S 223 29.5482 50 0.32 69
IV.ATMI.HHZ. 2020-04-22T23:41:55.21 0.3 undecidable manual S 343 26.3514 110 0.36 68
IV.PIEI.HHZ. 2020-04-22T23:41:54.77 3.0 undecidable manual P 0.2 0
IV.ATCC.EHZ. 2020-04-22T23:41:54.57 0.3 undecidable manual S 69 24.1536 112 0.44 70
IV.SACS.HHZ. 2020-04-22T23:41:54.30 3.0 undecidable manual P 0.11 0
IV.MURB.HHZ. 2020-04-22T23:41:53.70 0.3 undecidable manual S 37 21.7671 114 0.32 72
IV.ATLO.HNN. 2020-04-22T23:41:53.79 0.3 undecidable manual S 9 23.4543 113 -0.12 73
IV.ATPI.EHZ. 2020-04-22T23:41:52.39 0.3 undecidable manual P 5 38.3283 50 -0.22 72
IV.ATVA.EHN. 2020-04-22T23:41:52.58 0.3 undecidable manual S 342 20.0688 116 -0.26 72
IV.MOMA.HHZ. 2020-04-22T23:41:52.13 0.3 undecidable manual P 153 37.629 50 -0.37 68
IV.ATVO.HHZ. 2020-04-22T23:41:51.18 0.1 undecidable manual P 7 30.747 50 -0.27 96
IV.MGAB.HHZ. 2020-04-22T23:41:51.35 0.1 positive manual P 223 29.5482 50 0.09 97
IV.ATTE.HHZ. 2020-04-22T23:41:50.25 0.3 undecidable manual S 356 10.1787 134 0.27 75
IV.ATMI.HHZ. 2020-04-22T23:41:50.66 0.1 undecidable manual P 343 26.3514 110 -0.08 100
IV.ATLO.HNN. 2020-04-22T23:41:50.04 0.1 undecidable manual P 9 23.4543 113 -0.15 97
IV.ATCC.EHZ. 2020-04-22T23:41:50.23 0.3 undecidable manual P 69 24.1536 112 -0.09 73
IV.ATVA.EHN. 2020-04-22T23:41:49.54 0.1 undecidable manual P 342 20.0688 116 -0.03 100
IT.UMBT.HGE. 2020-04-22T23:41:49.83 0.1 undecidable manual P 356 21.9669 114 -0.09 99
IV.MURB.HHZ. 2020-04-22T23:41:49.94 0.3 undecidable manual P 37 21.7671 114 0.05 76
IV.ATTE.HHZ. 2020-04-22T23:41:48.20 0.6 undecidable manual P 356 10.1787 134 0.28 49
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATMI.HHN. ML:0.0 0.00017397795 0.32 AML other m 2020-04-22T23:41:57.48
IV.ATMI.HHE. ML:0.0 0.00013347115000000002 0.192 AML other m 2020-04-22T23:41:57.48
IV.ATTE.HHE. ML:1.2 0.00019516325000000002 0.1792 AML other m 2020-04-22T23:41:50.58
IV.ATTE.HHN. ML:1.1 0.0001753042 0.1152 AML other m 2020-04-22T23:41:50.77
IV.ATCC.EHE. ML:1.0 0.00006487089 0.1664 AML other m 2020-04-22T23:41:54.95
IV.ATCC.EHN. ML:1.0 0.0000531452765 0.1152 AML other m 2020-04-22T23:41:54.83
IV.ATVO.HHE. ML:0.8 0.00002902698 0.1408 AML other m 2020-04-22T23:41:56.79
IV.ATVO.HHN. ML:0.9 0.00003365099 0.2432 AML other m 2020-04-22T23:41:58.09
IV.MGAB.HHE. ML:1.3 0.00010274031 0.1152 AML other m 2020-04-22T23:41:56.37
IV.MGAB.HHN. ML:1.5 0.00014667245 0.1792 AML other m 2020-04-22T23:41:56.30
IV.MGAB.HNE. ML:1.2 0.00007974207999999999 0.2176 AML other m 2020-04-22T23:41:56.37
IV.MGAB.HNN. ML:1.5 0.00015207835 0.1536 AML other m 2020-04-22T23:41:56.39
IV.MOMA.HHE. ML:1.0 0.00003716663500000001 0.1408 AML other m 2020-04-22T23:42:00.45
IV.MOMA.HHN. ML:0.8 0.00002569457 0.2176 AML other m 2020-04-22T23:41:59.16
IV.MOMA.HNE. ML:1.6 0.00013836779999999997 1.408 AML other m 2020-04-22T23:42:05.25
IV.ATPI.EHE. ML:0.7 0.000020222310000000002 0.1792 AML other m 2020-04-22T23:41:59.46
IV.ATPI.EHN. ML:0.6 0.000017251855 0.1408 AML other m 2020-04-22T23:41:59.61
IV.ATPI.HNE. ML:1.4 0.0000871205 0.5632 AML other m 2020-04-22T23:42:01.71
IV.ATPI.HNN. ML:1.6 0.00014866854499999998 0.64 AML other m 2020-04-22T23:42:00.45
IV.SACS.HHE. ML:1.0 0.00003190059 1.5616 AML other m 2020-04-22T23:42:11.05
IV.SACS.HHN. ML:1.2 0.000041636624999999995 2.3936 AML other m 2020-04-22T23:42:08.62
IV.SACS.HNE. ML:1.6 0.00011118515 0.5632 AML other m 2020-04-22T23:42:08.12
IV.SACS.HNN. ML:1.6 0.00012749306500000002 1.3568 AML other m 2020-04-22T23:42:04.60
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