Earthquake with magnitude of ML 0.8 on date 28-07-2020 and time 22:44:32 (Italy) in region 3 km SW Campello sul Clitunno (PG)

A magnitude ML 0.8 earthquake occured in region: 3 km SW Campello sul Clitunno (PG), on

  • 28-07-2020 20:44:32 (UTC)
  • 28-07-2020 22:44:32 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8, 12.75 at 10 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Campello sul Clitunno PG 3 2442 2442
Castel Ritaldi PG 7 3278 5720
Spoleto PG 7 38218 43938
Trevi PG 9 8469 52407
Vallo di Nera PG 10 364 52771
Sant'Anatolia di Narco PG 10 564 53335
Scheggino PG 12 461 53796
Montefalco PG 13 5679 59475
Cerreto di Spoleto PG 14 1075 60550
Giano dell'Umbria PG 15 3846 64396
Sellano PG 18 1079 65475
Foligno PG 18 57155 122630
Poggiodomo PG 18 117 122747
Massa Martana PG 19 3770 126517
Bevagna PG 19 5081 131598
Gualdo Cattaneo PG 20 6155 137753

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km S of Foligno (57155 inhabitants)
28 Km NE of Terni (111501 inhabitants)
45 Km SE of Perugia (166134 inhabitants)
68 Km NE of Viterbo (67173 inhabitants)
73 Km NW of L'Aquila (69753 inhabitants)
80 Km W of Teramo (54892 inhabitants)
89 Km N of Guidonia Montecelio (88673 inhabitants)
93 Km N of Tivoli (56533 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 0.8 2020-07-28
20:44:32
42.8 12.75 10 2020-07-28
21:05:45
Sala Sismica INGV-Roma 81433491
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-28 20:44:32 ± 0.03
Latitude 42.80 ± 0.00
Longitude 12.75 ± 0.00
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 81433491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 256
Semi-minor axis of confidence ellipse (meter) 197
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 220
Circular confidence region, given by single value of horizontal uncertainty (meter) 260
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 76
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.44247
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 81433491
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-28 21:05:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CRTC.HHZ. 2020-07-28T20:44:59.50 3.0 undecidable manual S -2.88 0
IV.PE3.EHZ. 2020-07-28T20:44:47.01 3.0 undecidable manual P 0.45 0
IV.OFFI.HHZ. 2020-07-28T20:44:46.67 3.0 positive manual P 0.34 0
IV.NARO.HHZ. 2020-07-28T20:44:44.72 3.0 positive manual P -0.21 0
IV.LNSS.HNE. 2020-07-28T20:44:43.48 0.3 undecidable manual S 133 0.2914 50 0.22 70
IV.ASSB.HHZ. 2020-07-28T20:44:42.07 0.1 undecidable manual S 345 0.2509 50 0.01 98
IV.NRCA.HHZ. 2020-07-28T20:44:42.67 0.1 undecidable manual S 83 0.2698 50 0.06 97
IV.CESI.HNZ. 2020-07-28T20:44:41.65 0.3 undecidable manual S 29 0.2338 50 0.1 72
IV.CESX.HHE. 2020-07-28T20:44:41.35 0.3 undecidable manual S 212 0.2266 50 0.01 74
IV.CSP1.EHZ. 2020-07-28T20:44:40.75 0.3 undecidable manual P 49 0.4425 50 -0.34 66
IV.GAVE.EHZ. 2020-07-28T20:44:38.86 0.1 undecidable manual S 136 0.152 121 -0.01 100
IV.LNSS.HNE. 2020-07-28T20:44:38.45 0.3 undecidable manual P 133 0.2914 50 -0.05 72
IT.GNU.HGZ. 2020-07-28T20:44:38.28 0.3 undecidable manual S 271 0.1313 125 0.07 74
IV.MOMA.HHZ. 2020-07-28T20:44:38.26 0.1 undecidable manual S 271 0.1313 125 0.04 100
IV.NRCA.HHZ. 2020-07-28T20:44:37.97 0.1 undecidable manual P 83 0.2698 50 -0.16 95
IV.CESI.HNZ. 2020-07-28T20:44:37.58 0.3 undecidable manual P 29 0.2338 50 0.06 73
IV.ASSB.HHZ. 2020-07-28T20:44:37.94 0.1 undecidable manual P 345 0.2509 50 0.13 96
IV.CESX.HHE. 2020-07-28T20:44:37.24 0.3 undecidable manual P 212 0.2266 50 -0.15 72
IV.GAVE.EHZ. 2020-07-28T20:44:36.06 0.1 undecidable manual P 136 0.152 121 0.09 98
IV.MOMA.HHZ. 2020-07-28T20:44:35.55 0.1 undecidable manual P 271 0.1313 125 -0.04 100
IT.GNU.HGZ. 2020-07-28T20:44:35.55 0.3 undecidable manual P 271 0.1313 125 -0.04 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHN. ML:0.8 3.27E-5 0.42 AML other m 2020-07-28T20:44:42.49
IV.MOMA.HHE. ML:0.5 2.931345E-5 0.1152 AML other m 2020-07-28T20:44:39.06
IV.MOMA.HHN. ML:0.6 3.7286485E-5 0.448 AML other m 2020-07-28T20:44:38.95
IV.GAVE.EHE. ML:1.1 0.00011125385 0.1152 AML other m 2020-07-28T20:44:39.57
IV.GAVE.EHN. ML:1.2 0.00012732775 0.3072 AML other m 2020-07-28T20:44:39.88
IV.ASSB.HHE. ML:0.7 2.4802485E-5 0.7552 AML other m 2020-07-28T20:44:43.10
IV.NRCA.HHE. ML:0.6 1.8214355E-5 0.1536 AML other m 2020-07-28T20:44:42.85
IV.NRCA.HHN. ML:0.8 2.9748515E-5 0.1024 AML other m 2020-07-28T20:44:42.98
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download