Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 29-04-2020 and time 04:08:43 (Italy) in region 5 km N Spoleto (PG)

A magnitude ML 1.0 earthquake occured in region: 5 km N Spoleto (PG), on

  • 29-04-2020 02:08:43 (UTC)
  • 29-04-2020 04:08:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7790, 12.7390 at 12 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
Spoleto PG 5 38218 38218
Campello sul Clitunno PG 6 2442 40660
Castel Ritaldi PG 7 3278 43938
Sant'Anatolia di Narco PG 9 564 44502
Vallo di Nera PG 10 364 44866
Scheggino PG 11 461 45327
Trevi PG 11 8469 53796
Giano dell'Umbria PG 15 3846 57642
Montefalco PG 15 5679 63321
Cerreto di Spoleto PG 15 1075 64396
Massa Martana PG 18 3770 68166
Poggiodomo PG 18 117 68283
Ferentillo TR 18 1913 70196
Acquasparta TR 18 4778 74974
Sellano PG 20 1079 76053
Foligno PG 20 57155 133208

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km S of Foligno (57155 inhabitants)
25 Km NE of Terni (111501 inhabitants)
46 Km SE of Perugia (166134 inhabitants)
66 Km NE of Viterbo (67173 inhabitants)
72 Km NW of L'Aquila (69753 inhabitants)
80 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 1.0 2020-04-29
02:08:43		 42.7793 12.739 12 2020-04-29
02:15:10		 Sala Sismica INGV-Roma 78657161
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-29 02:08:43 ± 0.04
Latitude 42.7793 ± 0.0027
Longitude 12.7390 ± 0.0037
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 78657161

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 309
Semi-minor axis of confidence ellipse (meter) 248
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) 310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 107
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.11
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.44157
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 78657161
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-29 02:15:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SACS.HHZ. 2020-04-29T02:09:05.96 3.0 undecidable manual S 0.01 0
IV.EL6.EHZ. 2020-04-29T02:08:54.09 3.0 undecidable manual P -1.43 0
IV.CESI.HHZ. 2020-04-29T02:08:53.28 0.6 undecidable manual S 28 28.4493 92 -0.03 66
IV.CSP1.EHZ. 2020-04-29T02:08:52.71 3.0 positive manual P -0.01 0
IV.RM33.EHZ. 2020-04-29T02:08:52.12 0.3 undecidable manual P 128 49.0176 91 -0.13 93
IV.ARRO.EHZ. 2020-04-29T02:08:51.81 0.6 undecidable manual S 174 22.3554 93 0.12 65
IV.CESX.HHZ. 2020-04-29T02:08:51.58 0.6 undecidable manual S 213 22.6551 93 -0.2 64
IV.FDMO.HHZ. 2020-04-29T02:08:50.84 0.3 undecidable manual P 45 40.1265 91 -0.04 96
IV.CESI.HHZ. 2020-04-29T02:08:49.09 0.3 undecidable manual P 28 28.4493 92 0.02 99
IT.MTCL.HGN. 2020-04-29T02:08:49.75 0.6 undecidable manual P 42 31.8459 91 0.15 64
IV.NRCA.HNZ. 2020-04-29T02:08:49.35 0.6 undecidable manual P 79 31.1466 91 -0.14 64
IV.MOMA.HHZ. 2020-04-29T02:08:49.37 0.6 undecidable manual S 281 13.9749 104 -0.12 66
IV.ARRO.EHZ. 2020-04-29T02:08:48.22 0.6 positive manual P 174 22.3554 93 0.09 66
IV.CESX.HHZ. 2020-04-29T02:08:48.47 1.0 negative manual P 213 22.6551 93 0.28 32
IV.MOMA.HHZ. 2020-04-29T02:08:46.94 0.3 undecidable manual P 281 13.9749 104 0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HHN. ML:1.3 0.000184 0.3 AML other m 2020-04-29T02:08:49.78
IV.MOMA.HHE. ML:1.1 0.0001305 0.22 AML other m 2020-04-29T02:08:49.79
IV.CESX.HHN. ML:0.9 0.00005 0.74 AML other m 2020-04-29T02:08:53.40
IV.CESX.HHE. ML:0.8 0.000044200000000000004 0.56 AML other m 2020-04-29T02:08:53.36
IV.FDMO.HHE. ML:0.8 0.000018 0.16 AML other m 2020-04-29T02:08:57.40
IV.FDMO.HHN. ML:0.8 0.0000183 0.42 AML other m 2020-04-29T02:08:58.51
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