Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 31-03-2020 and time 22:48:15 (UTC) in region 5 km N Spoleto (PG)

A magnitude ML 1.3 earthquake occured in region: 5 km N Spoleto (PG), on

  • 31-03-2020 22:48:15 (UTC)
  • 01-04-2020 00:48:15 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7790, 12.7360 at 9 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.

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
Spoleto PG 5 38218 38218
Campello sul Clitunno PG 6 2442 40660
Castel Ritaldi PG 7 3278 43938
Sant'Anatolia di Narco PG 10 564 44502
Vallo di Nera PG 10 364 44866
Scheggino PG 11 461 45327
Trevi PG 11 8469 53796
Giano dell'Umbria PG 14 3846 57642
Montefalco PG 15 5679 63321
Cerreto di Spoleto PG 16 1075 64396
Massa Martana PG 17 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 N of Terni (111501 inhabitants)
46 Km SE of Perugia (166134 inhabitants)
65 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
Bulletin
Rev1000 		ML 1.3 2020-03-31
22:48:15		 42.7787 12.7363 9 2020-07-18
21:08:33		 Bollettino Sismico Italiano INGV 78360501
Reviewed
Rev100 		ML 1.3 2020-03-31
22:48:15		 42.7843 12.7128 11 2020-03-31
22:58:51		 Sala Sismica INGV-Roma 77736661
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-03-31 22:48:15 ± 0.06
Latitude 42.7787 ± 0.0027
Longitude 12.7363 ± 0.0061
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 78360501

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 448
Semi-minor axis of confidence ellipse (meter) 342
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 266
Circular confidence region, given by single value of horizontal uncertainty (meter) 450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 69
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 24
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) 0.47664
Number of stations at which the event was observed 20
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 16
Type of magnitude ML
Reference to an origin 77736661
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-03-31 22:58:51

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 78360501
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-04-18 17:41:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
SI.BOSI.HHZ. 2020-03-31T22:50:07.87 3.0 undecidable manual Sg 6.06 0
IV.GALF.HHZ. 2020-03-31T22:49:47.11 3.0 negative manual Pg 11.65 0
GU.ENR.HHZ. 2020-03-31T22:49:10.57 3.0 undecidable manual Pn -6.18 0
MN.TRI.HHZ. 2020-03-31T22:49:03.46 3.0 negative manual Pg -1.63 0
IV.IFOR.HHZ. 2020-03-31T22:48:57.08 3.0 undecidable manual Pg 2.75 0
IV.VCEL.EHZ. 2020-03-31T22:48:54.01 3.0 undecidable manual Sn -1.03 0
IV.LRP.EHZ. 2020-03-31T22:48:38.58 3.0 undecidable manual Pg -3.33 0
IV.CSP1.EHZ. 2020-03-31T22:48:32.38 0.6 undecidable manual S 47 51.5151 50 0.25 45
IV.ATCC.EHE. 2020-03-31T22:48:31.25 0.6 undecidable manual S 350 45.7209 50 0.66 41
IV.MC2.EHZ. 2020-03-31T22:48:29.28 0.6 undecidable manual S 68 39.627 50 0.32 46
IV.FDMO.HHZ. 2020-03-31T22:48:29.12 0.3 undecidable manual S 45 40.4262 50 -0.04 73
IV.CESI.HHZ. 2020-03-31T22:48:26.11 0.3 undecidable manual S 29 28.5492 108 0.18 72
IV.LNSS.HHZ. 2020-03-31T22:48:26.62 0.3 undecidable manual S 128 31.5462 50 -0.18 72
IV.MGAB.HHZ. 2020-03-31T22:48:25.53 0.1 undecidable manual P 287 52.9026 50 0.22 91
IV.ARRO.EHZ. 2020-03-31T22:48:24.24 0.3 undecidable manual S 174 22.2555 113 0.37 70
IV.CSP1.EHZ. 2020-03-31T22:48:24.98 0.3 undecidable manual P 47 51.5151 50 -0.13 70
IV.ATCC.EHE. 2020-03-31T22:48:24.26 0.1 undecidable manual P 350 45.7209 50 0.04 96
IV.CESX.HHZ. 2020-03-31T22:48:24.23 0.3 undecidable manual S 213 22.4553 112 0.29 71
IV.FDMO.HHZ. 2020-03-31T22:48:23.18 0.3 undecidable manual P 45 40.4262 50 -0.21 70
IV.MC2.EHZ. 2020-03-31T22:48:23.43 0.3 undecidable manual P 68 39.627 50 0.16 71
IT.FOPC.HGN. 2020-03-31T22:48:23.84 0.6 undecidable manual S 353 21.3675 113 0.26 48
IT.GNU.HGZ. 2020-03-31T22:48:21.02 0.6 undecidable manual S 282 13.7751 124 -0.25 49
IV.CESI.HHZ. 2020-03-31T22:48:21.41 0.6 undecidable manual P 29 28.5492 108 -0.12 49
IV.MOMA.HHZ. 2020-03-31T22:48:21.07 0.1 undecidable manual S 282 13.7751 124 -0.2 98
IV.LNSS.HHZ. 2020-03-31T22:48:21.73 0.1 undecidable manual P 128 31.5462 50 -0.3 93
IV.NRCA.HHZ. 2020-03-31T22:48:21.54 0.1 undecidable manual P 79 31.3464 50 -0.46 90
IV.CESX.HHZ. 2020-03-31T22:48:20.31 0.1 undecidable manual P 213 22.4553 112 -0.06 99
IV.ARRO.EHZ. 2020-03-31T22:48:20.61 0.3 undecidable manual P 174 22.2555 113 0.27 71
IT.FOPC.HGN. 2020-03-31T22:48:20.12 0.1 undecidable manual P 353 21.3675 113 -0.05 100
IV.MOMA.HHZ. 2020-03-31T22:48:18.73 0.1 undecidable manual P 282 13.7751 124 -0.11 100
IT.GNU.HGZ. 2020-03-31T22:48:18.72 0.1 undecidable manual P 282 13.7751 124 -0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HNN. ML:1.6 0.00037 1.14 AML other m 2020-03-31T22:48:21.83
IV.MOMA.HHE. ML:1.6 0.000468 0.2 AML other m 2020-03-31T22:48:21.63
IV.MOMA.HNE. ML:1.6 0.000423 0.2 AML other m 2020-03-31T22:48:21.63
IV.MOMA.HHN. ML:1.6 0.00038149999999999995 0.16 AML other m 2020-03-31T22:48:21.74
IV.ARRO.EHN. ML:1.0 0.00006235 0.54 AML other m 2020-03-31T22:48:26.53
IV.ARRO.EHE. ML:0.9 0.00005185 1.22 AML other m 2020-03-31T22:48:27.18
IV.LNSS.HHE. ML:1.3 0.0000987 0.56 AML other m 2020-03-31T22:48:28.17
IV.CESI.HHN. ML:1.3 0.00009604999999999999 1.48 AML other m 2020-03-31T22:48:29.88
IV.CESI.HHE. ML:1.1 0.0000692 1.14 AML other m 2020-03-31T22:48:29.26
IV.FDMO.HHE. ML:1.2 0.00004795 0.2 AML other m 2020-03-31T22:48:29.58
IV.LNSS.HHN. ML:1.3 0.0000843 0.66 AML other m 2020-03-31T22:48:30.58
IV.FDMO.HHN. ML:1.2 0.000059399999999999994 1.58 AML other m 2020-03-31T22:48:30.79
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