Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.5 on date 09-08-2019 and time 03:03:55 (Italy) in region 3 km W Cerreto di Spoleto (PG)

A magnitude ML 0.5 earthquake occured in region: 3 km W Cerreto di Spoleto (PG), on

  • 09-08-2019 01:03:55 (UTC)
  • 09-08-2019 03:03:55 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8240, 12.8760 at 11 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
Cerreto di Spoleto PG 3 1075 1075
Vallo di Nera PG 6 364 1439
Campello sul Clitunno PG 8 2442 3881
Sellano PG 9 1079 4960
Sant'Anatolia di Narco PG 10 564 5524
Trevi PG 12 8469 13993
Scheggino PG 13 461 14454
Poggiodomo PG 13 117 14571
Preci PG 15 724 15295
Spoleto PG 15 38218 53513
Cascia PG 16 3217 56730
Castel Ritaldi PG 17 3278 60008
Norcia PG 18 4957 64965
Montefalco PG 20 5679 70644
Monteleone di Spoleto PG 20 599 71243

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km SE of Foligno (57155 inhabitants)
35 Km NE of Terni (111501 inhabitants)
51 Km SE of Perugia (166134 inhabitants)
68 Km NW of L'Aquila (69753 inhabitants)
70 Km W of Teramo (54892 inhabitants)
78 Km NE of Viterbo (67173 inhabitants)
92 Km N of Guidonia Montecelio (88673 inhabitants)
96 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 0.5 2019-08-09
01:03:55		 42.8237 12.8755 11 2019-11-13
14:31:07		 Bollettino Sismico Italiano INGV 73369941
Reviewed
Rev100 		ML 0.5 2019-08-09
01:03:55		 42.8222 12.8693 11 2019-08-09
01:54:06		 Sala Sismica INGV-Roma 71287751
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-09 01:03:55 ± 0.05
Latitude 42.8237 ± 0.0027
Longitude 12.8755 ± 0.0025
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 73369941

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 280
Semi-minor axis of confidence ellipse (meter) 240
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 26
Circular confidence region, given by single value of horizontal uncertainty (meter) 280.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 64
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.13220
Epicentral distance of station farthest from the epicenter (degree) 0.53150
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 73369941
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-10-21 08:54:18

ML:0.5

Field Value
Value 0.5
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 71287751
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-09 01:54:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2019-08-09T01:04:14.85 0.1 undecidable manual S 18 58.9965 90 0.67 81
IV.CESX.HHE. 2019-08-09T01:04:07.13 0.3 undecidable manual S 225 33.5442 90 -0.24 71
IV.FDMO.HHZ. 2019-08-09T01:04:06.22 0.1 undecidable manual S 36 29.2485 90 -0.01 100
IV.EL6.EHZ. 2019-08-09T01:04:06.35 0.1 undecidable manual P 18 58.9965 90 -0.14 92
IV.ASSB.HHZ. 2019-08-09T01:04:06.33 0.1 undecidable manual S 324 30.0477 90 -0.11 97
IV.LNSS.HHE. 2019-08-09T01:04:05.70 0.3 undecidable manual S 151 27.9498 90 -0.18 73
IV.MOMA.HHE. 2019-08-09T01:04:05.08 0.3 undecidable manual S 265 24.9528 90 -0.01 75
IT.MTCL.HGE. 2019-08-09T01:04:04.07 0.3 undecidable manual S 28 21.3675 90 -0.07 75
IV.NRCA.HHZ. 2019-08-09T01:04:03.51 0.1 undecidable manual S 87 19.4694 90 -0.11 100
IV.CESI.HHE. 2019-08-09T01:04:03.96 0.3 undecidable manual S 7 20.2686 90 0.13 75
IV.GAVE.EHZ. 2019-08-09T01:04:02.15 0.1 undecidable manual S 174 14.6742 90 -0.19 99
IV.CESX.HHE. 2019-08-09T01:04:02.30 0.3 undecidable manual P 225 33.5442 90 -0.25 71
IV.LNSS.HHE. 2019-08-09T01:04:01.72 0.3 undecidable manual P 151 27.9498 90 0.03 75
IV.FDMO.HHZ. 2019-08-09T01:04:01.90 0.1 undecidable manual P 36 29.2485 90 0.01 100
IV.MOMA.HHE. 2019-08-09T01:04:01.44 0.3 undecidable manual P 265 24.9528 90 0.21 73
IV.ARRO.EHZ. 2019-08-09T01:04:01.69 0.3 undecidable manual P 198 28.5492 90 -0.1 74
IV.ASSB.HHZ. 2019-08-09T01:04:01.93 0.1 undecidable manual P 324 30.0477 90 -0.08 98
IV.NRCA.HHZ. 2019-08-09T01:04:00.48 0.1 undecidable manual P 87 19.4694 90 0.09 100
IV.CESI.HHE. 2019-08-09T01:04:00.61 0.3 undecidable manual P 7 20.2686 90 0.1 75
IT.MTCL.HGE. 2019-08-09T01:04:00.71 0.3 undecidable manual P 28 21.3675 90 0.02 76
IV.GAVE.EHZ. 2019-08-09T01:03:59.80 0.1 undecidable manual P 174 14.6742 90 0.15 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHN. ML:0.9 0.00007951483500000001 0.08 AML other m 2019-08-09T01:04:02.54
IV.GAVE.EHE. ML:1.0 0.00009560394 0.26 AML other m 2019-08-09T01:04:03.38
IV.NRCA.HHN. ML:0.7 0.00003872054 0.12 AML other m 2019-08-09T01:04:03.62
IV.NRCA.HHE. ML:0.4 0.000017822724999999996 0.16 AML other m 2019-08-09T01:04:04.37
IV.ARRO.EHN. ML:0.3 0.000012015390000000001 0.26 AML other m 2019-08-09T01:04:06.78
IV.ASSB.HHN. ML:0.5 0.000013170995 0.12 AML other m 2019-08-09T01:04:07.12
IV.ASSB.HHE. ML:0.3 0.000012443638 0.16 AML other m 2019-08-09T01:04:07.24
IV.FDMO.HHE. ML:0.3 0.0000089389715 1.7 AML other m 2019-08-09T01:04:07.96
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