Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 23-08-2020 and time 16:30:19 (Italy) in region 4 km N Poggiodomo (PG)

A magnitude ML 1.2 earthquake occured in region: 4 km N Poggiodomo (PG), on

  • 23-08-2020 14:30:19 (UTC)
  • 23-08-2020 16:30:19 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7480, 12.9410 at 11 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Poggiodomo PG 4 117 117
Vallo di Nera PG 7 364 481
Cascia PG 7 3217 3698
Cerreto di Spoleto PG 8 1075 4773
Sant'Anatolia di Narco PG 9 564 5337
Scheggino PG 10 461 5798
Monteleone di Spoleto PG 11 599 6397
Norcia PG 13 4957 11354
Campello sul Clitunno PG 16 2442 13796
Sellano PG 16 1079 14875
Spoleto PG 17 38218 53093
Preci PG 17 724 53817
Ferentillo TR 19 1913 55730
Polino TR 20 233 55963

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km SE of Foligno (57155 inhabitants)
32 Km NE of Terni (111501 inhabitants)
58 Km NW of L'Aquila (69753 inhabitants)
60 Km SE of Perugia (166134 inhabitants)
63 Km W of Teramo (54892 inhabitants)
78 Km E of Viterbo (67173 inhabitants)
85 Km N of Guidonia Montecelio (88673 inhabitants)
88 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 2020-08-23
14:30:19		 42.7485 12.9408 11 2020-08-23
14:41:14		 Sala Sismica INGV-Roma 82261111
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-23 14:30:19 ± 0.06
Latitude 42.7485 ± 0.0027
Longitude 12.9408 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 82261111

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 347
Semi-minor axis of confidence ellipse (meter) 155
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 112
Circular confidence region, given by single value of horizontal uncertainty (meter) 350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 84
Number of associated phases, regardless of their use for origin computation 38
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.35883
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 11
Type of magnitude ML
Reference to an origin 82261111
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-23 14:41:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CMPR.HHZ. 2020-08-23T14:32:04.48 3.0 undecidable manual Sg 10.95 0
IV.SGO.HNZ. 2020-08-23T14:31:53.87 3.0 undecidable manual Sg 5.43 0
IV.PZUN.HNZ. 2020-08-23T14:31:42.61 3.0 undecidable manual Sn -9.28 0
AC.VLO.HHZ. 2020-08-23T14:31:40.51 3.0 undecidable manual Pn 2.35 0
IV.MCRV.HHZ. 2020-08-23T14:31:37.21 3.0 undecidable manual Sn -5.24 0
IV.PAOL.HHZ. 2020-08-23T14:31:31.31 3.0 undecidable manual Sg -0.45 0
GU.GSCL.HHZ. 2020-08-23T14:31:16.10 3.0 undecidable manual Sg 5.1 0
GU.GORR.HHZ. 2020-08-23T14:30:59.00 3.0 undecidable manual Pn 1.07 0
ST.DOSS.HHZ. 2020-08-23T14:30:53.68 3.0 negative manual Pn -2.38 0
IV.BRSN.EHZ. 2020-08-23T14:30:44.63 3.0 undecidable manual S -3.82 0
IV.RIBO.EHZ.01 2020-08-23T14:30:36.04 3.0 positive manual Pn -2.85 0
IV.ASSB.HHZ. 2020-08-23T14:30:32.71 0.3 undecidable manual S 325 39.8268 91 -0.15 71
IV.FDMO.HHZ. 2020-08-23T14:30:31.24 0.6 undecidable manual S 20 34.0437 91 -0.08 49
IV.RM33.EHZ. 2020-08-23T14:30:31.72 0.3 undecidable manual S 140 34.743 91 0.23 70
IV.MOMA.HHZ. 2020-08-23T14:30:30.77 0.3 undecidable manual S 282 30.8469 91 0.33 69
IV.CESX.HHZ. 2020-08-23T14:30:30.37 0.3 undecidable manual S 242 32.745 91 -0.6 64
IT.MTCL.HGZ. 2020-08-23T14:30:29.38 0.3 undecidable manual S 10 27.6501 91 -0.22 72
IV.MC2.EHE. 2020-08-23T14:30:29.52 0.6 undecidable manual S 48 27.0507 91 0.07 49
IV.CESI.HHZ. 2020-08-23T14:30:29.80 0.3 undecidable manual S 354 28.5492 91 -0.05 74
IV.FEMA.HNZ. 2020-08-23T14:30:28.98 0.6 undecidable manual S 20 25.2525 91 0.01 50
IV.ARRO.EHZ. 2020-08-23T14:30:28.37 0.3 undecidable manual S 217 23.5542 92 -0.15 73
IV.ASSB.HHZ. 2020-08-23T14:30:27.27 0.1 undecidable manual P 325 39.8268 91 -0.06 97
IV.LNSS.HHZ. 2020-08-23T14:30:26.88 0.3 undecidable manual S 153 18.0708 93 -0.17 74
IV.RM33.EHZ. 2020-08-23T14:30:26.50 0.1 undecidable manual P 140 34.743 91 -0.03 98
IV.FDMO.HHZ. 2020-08-23T14:30:26.32 0.1 undecidable manual P 20 34.0437 91 -0.11 97
IV.MOMA.HHZ. 2020-08-23T14:30:26.32 0.1 undecidable manual P 282 30.8469 91 0.39 91
IV.CESX.HHZ. 2020-08-23T14:30:26.08 0.1 undecidable manual P 242 32.745 91 -0.16 96
IV.NRCA.HHZ. 2020-08-23T14:30:26.40 0.6 undecidable manual S 56 16.9719 94 -0.36 48
IV.CESI.HHZ. 2020-08-23T14:30:25.52 0.1 undecidable manual P 354 28.5492 91 -0.07 99
IV.FEMA.HNZ. 2020-08-23T14:30:25.04 0.1 undecidable manual P 20 25.2525 91 -0.04 100
IT.MTCL.HGZ. 2020-08-23T14:30:25.26 0.1 undecidable manual P 10 27.6501 91 -0.18 97
IV.MC2.EHE. 2020-08-23T14:30:25.42 0.1 undecidable manual P 48 27.0507 91 0.07 98
IV.GAVE.HNE. 2020-08-23T14:30:24.30 0.3 undecidable manual S 211 7.2927 136 -0.12 77
IV.ARRO.EHZ. 2020-08-23T14:30:24.84 0.1 positive manual P 217 23.5542 92 0.02 99
IV.NRCA.HHZ. 2020-08-23T14:30:23.76 0.6 positive manual P 56 16.9719 94 -0.04 51
IV.LNSS.HHZ. 2020-08-23T14:30:23.95 0.6 positive manual P 153 18.0708 93 -0.02 50
IV.GAVE.HNE. 2020-08-23T14:30:22.57 0.1 undecidable manual P 211 7.2927 136 0.12 99
IV.SENI.HNZ. 2020-08-23T14:30:20.08 3.0 undecidable manual S -4.75 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.7 0.00040800000000000005 0.1 AML other m 2020-08-23T14:30:26.61
IV.NRCA.HHN. ML:1.3 0.00018099999999999998 0.16 AML other m 2020-08-23T14:30:26.57
IV.LNSS.HHN. ML:1.2 0.0001285 0.96 AML other m 2020-08-23T14:30:28.16
IV.LNSS.HHE. ML:1.2 0.00011044999999999999 0.36 AML other m 2020-08-23T14:30:28.48
IV.ARRO.EHE. ML:1.0 0.00005875 0.28 AML other m 2020-08-23T14:30:28.57
IV.ARRO.EHN. ML:1.1 0.00007205 0.16 AML other m 2020-08-23T14:30:28.76
IV.FDMO.HHE. ML:1.2 0.00006884999999999999 0.38 AML other m 2020-08-23T14:30:31.42
IV.FDMO.HHN. ML:1.2 0.00006785 1.38 AML other m 2020-08-23T14:30:32.07
IV.RM33.EHN. ML:0.9 0.0000334 1.44 AML other m 2020-08-23T14:30:32.04
IV.RM33.EHE. ML:1.1 0.0000567 0.74 AML other m 2020-08-23T14:30:32.45
IV.PZUN.HNE. ML:3.4 0.000264 0.38 AML other m 2020-08-23T14:31:44.88
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