Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 20-05-2020 and time 22:55:50 (Italy) in region 5 km S Cascia (PG)

A magnitude ML 1.4 earthquake occured in region: 5 km S Cascia (PG), on

  • 20-05-2020 20:55:50 (UTC)
  • 20-05-2020 22:55:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6740, 13.0310 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
Cascia PG 5 3217 3217
Monteleone di Spoleto PG 7 599 3816
Poggiodomo PG 9 117 3933
Cittareale RI 12 482 4415
Leonessa RI 14 2435 6850
Norcia PG 14 4957 11807
Scheggino PG 17 461 12268
Sant'Anatolia di Narco PG 17 564 12832
Vallo di Nera PG 17 364 13196
Posta RI 18 694 13890
Accumoli RI 18 667 14557
Polino TR 18 233 14790
Cerreto di Spoleto PG 19 1075 15865
Borbona RI 20 617 16482

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Terni (111501 inhabitants)
41 Km SE of Foligno (57155 inhabitants)
47 Km NW of L'Aquila (69753 inhabitants)
55 Km W of Teramo (54892 inhabitants)
71 Km SE of Perugia (166134 inhabitants)
79 Km NE of Guidonia Montecelio (88673 inhabitants)
81 Km E of Viterbo (67173 inhabitants)
81 Km N of Tivoli (56533 inhabitants)
93 Km W of Montesilvano (53738 inhabitants)
98 Km NE of Roma (2864731 inhabitants)
100 Km W of Pescara (121014 inhabitants)
100 Km W of Chieti (51815 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 2020-05-20
20:55:50		 42.6742 13.0313 10 2020-11-19
12:36:56		 Bollettino Sismico Italiano INGV 81677071
Reviewed
Rev100 		ML 1.3 2020-05-20
20:55:51		 42.6757 13.0353 10 2020-05-20
21:03:54		 Sala Sismica INGV-Roma 79383231
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-05-20 20:55:50 ± 0.11
Latitude 42.6742 ± 0.0081
Longitude 13.0313 ± 0.0135
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 81677071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1008
Semi-minor axis of confidence ellipse (meter) 834
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 102
Circular confidence region, given by single value of horizontal uncertainty (meter) 1010.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 80
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 16
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.69518
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 79383231
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-05-20 21:03:54

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 21
Type of magnitude ML
Reference to an origin 81677071
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-08-05 14:53:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RMP.HHZ. 2020-05-20T20:56:18.84 3.0 undecidable manual S -2.2 0
IV.MURB.HNZ. 2020-05-20T20:56:02.95 0.3 undecidable manual P 328 77.1672 50 -1.4 41
IV.CSP1.EHZ. 2020-05-20T20:56:00.08 0.1 undecidable manual P 17 48.4182 50 0.16 95
IV.ASSB.HHZ. 2020-05-20T20:56:00.94 0.6 positive manual P 324 50.9157 50 0.64 42
IV.RM33.EHZ. 2020-05-20T20:55:59.63 0.6 undecidable manual S 141 23.6541 113 -0.2 49
IV.TERO.HHZ. 2020-05-20T20:55:59.47 0.1 undecidable manual P 97 47.0196 50 -0.24 93
IV.FDMO.HHZ. 2020-05-20T20:55:58.87 0.1 undecidable manual P 6 40.4262 50 0.17 97
IV.CESI.HHZ. 2020-05-20T20:55:58.40 0.1 undecidable manual P 344 38.1285 50 0.06 99
IV.MC2.EHZ. 2020-05-20T20:55:57.17 0.1 undecidable manual P 26 29.2485 50 0.2 98
IV.MMO1.EHZ. 2020-05-20T20:55:57.67 0.1 undecidable manual P 44 34.6431 50 -0.13 98
IV.NRCA.HHZ. 2020-05-20T20:55:57.90 0.6 undecidable manual S 21 18.9699 118 -0.46 48
IV.SMA1.EHZ. 2020-05-20T20:55:56.64 0.3 negative manual P 101 25.2525 50 0.29 72
IV.RM33.EHZ. 2020-05-20T20:55:56.07 0.6 positive manual P 141 23.6541 113 0 51
IV.ARRO.EHZ. 2020-05-20T20:55:56.10 0.3 positive manual P 244 24.1536 113 -0.05 76
IV.NRCA.HHZ. 2020-05-20T20:55:55.34 0.1 undecidable manual P 21 18.9699 118 0.13 100
IV.LNSS.HHZ. 2020-05-20T20:55:55.25 0.3 undecidable manual S 175 7.9809 142 -0.12 78
IV.LNSS.HHZ. 2020-05-20T20:55:53.73 0.1 undecidable manual P 175 7.9809 142 0.24 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HNE. ML:2.0 0.0015235665 0.128 AML other m 2020-05-20T20:55:55.71
IV.LNSS.HNN. ML:1.8 0.0010314983 0.128 AML other m 2020-05-20T20:55:55.60
IV.LNSS.HHE. ML:2.1 0.0016593715 0.128 AML other m 2020-05-20T20:55:55.71
IV.LNSS.HHN. ML:1.9 0.0010805643 0.1408 AML other m 2020-05-20T20:55:55.60
IV.NRCA.HHN. ML:1.4 0.00017794605000000002 0.128 AML other m 2020-05-20T20:55:58.54
IV.NRCA.HNE. ML:1.7 0.000365773 0.1408 AML other m 2020-05-20T20:55:58.52
IV.NRCA.HHE. ML:1.7 0.0003786593 0.1408 AML other m 2020-05-20T20:55:58.53
IV.NRCA.HNN. ML:1.3 0.00016672569999999997 0.1152 AML other m 2020-05-20T20:55:58.50
IV.RM33.EHN. ML:1.3 0.000121507545 0.2816 AML other m 2020-05-20T20:56:00.10
IV.RM33.HNN. ML:1.4 0.00014556149500000003 0.256 AML other m 2020-05-20T20:56:00.11
IV.RM33.EHE. ML:1.1 0.00008156188000000001 0.2048 AML other m 2020-05-20T20:56:01.05
IV.ARRO.EHN. ML:1.1 0.0000714958 0.1408 AML other m 2020-05-20T20:56:00.84
IV.ARRO.EHE. ML:1.0 0.00006360189 0.1664 AML other m 2020-05-20T20:56:00.71
IV.SMA1.EHE. ML:1.6 0.0002111592 0.1792 AML other m 2020-05-20T20:56:01.12
IV.SMA1.EHN. ML:1.5 0.0001806736 0.2176 AML other m 2020-05-20T20:56:01.08
IV.FDMO.HHN. ML:1.0 0.000034546544999999995 0.2816 AML other m 2020-05-20T20:56:04.99
IV.FDMO.HHE. ML:0.9 0.000027300085 0.2944 AML other m 2020-05-20T20:56:04.96
IV.TERO.HHE. ML:0.8 0.00002175289 0.1792 AML other m 2020-05-20T20:56:06.05
IV.TERO.HHN. ML:1.0 0.00002294232 0.0768 AML other m 2020-05-20T20:56:06.23
IV.ASSB.HHE. ML:1.1 0.00003308817 0.2176 AML other m 2020-05-20T20:56:08.19
IV.MURB.HHN. ML:1.4 0.000039958095 0.2432 AML other m 2020-05-20T20:56:16.24
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