Earthquake with magnitude of ML 1.0 on date 18-09-2021 and time 12:12:46 (Italy) in region 6 km NE Gualdo Tadino (PG)

A magnitude ML 1.0 earthquake occured in region: 6 km NE Gualdo Tadino (PG), on

  • 18-09-2021 10:12:46 (UTC)
  • 18-09-2021 12:12:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.264, 12.849 at 52 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
Gualdo Tadino PG 6 15208 15208
Fossato di Vico PG 8 2840 18048
Esanatoglia MC 8 2034 20082
Fabriano AN 9 31480 51562
Fiuminata MC 11 1402 52964
Sigillo PG 12 2404 55368
Cerreto d'Esi AN 13 3817 59185
Matelica MC 13 9981 69166
Pioraco MC 15 1134 70300
Costacciaro PG 15 1216 71516
Sefro MC 15 422 71938
Nocera Umbra PG 18 5839 77777
Castelraimondo MC 18 4587 82364
Gagliole MC 18 620 82984
Sassoferrato AN 19 7285 90269
Genga AN 20 1797 92066

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km NE of Foligno (57155 inhabitants)
41 Km E of Perugia (166134 inhabitants)
66 Km S of Fano (60888 inhabitants)
67 Km SW of Ancona (100861 inhabitants)
72 Km S of Pesaro (94582 inhabitants)
80 Km N of Terni (111501 inhabitants)
81 Km E of Arezzo (99543 inhabitants)
92 Km S of Rimini (147750 inhabitants)
97 Km NW of Teramo (54892 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web 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 1.0 2021-09-18
10:12:46
43.2643 12.8487 52 2021-09-18
10:51:12
Sala Sismica INGV-Roma 95581061
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-18 10:12:46 ± 0.29
Latitude 43.2643 ± 0.0180
Longitude 12.8487 ± 0.0296
Depth (km) 52 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95581061

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2753
Semi-minor axis of confidence ellipse (meter) 972
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 52
Circular confidence region, given by single value of horizontal uncertainty (meter) 2750
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 80
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.41
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.50452
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 17
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 95581061
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-18 10:51:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MMO1.HNZ. 2021-09-18T10:13:08.08 0.3 undecidable manual S 136 0.5045 121 1.51 38
IV.NRCA.HNZ. 2021-09-18T10:13:07.30 0.3 undecidable manual S 156 0.4721 124 1.39 40
IV.CSP1.EHZ. 2021-09-18T10:13:03.51 3.0 undecidable manual S 0
IV.MURB.HHZ. 2021-09-18T10:13:03.46 3.0 undecidable manual S 0
IV.CRE.HHZ. 2021-09-18T10:13:03.88 3.0 negative manual Pg 0.07 0
IV.FDMO.HHZ. 2021-09-18T10:13:02.19 0.3 undecidable manual S 143 0.2869 141 -0.43 68
IV.SSFR.HHE. 2021-09-18T10:13:01.91 0.3 undecidable manual S 344 0.1781 155 0.67 64
IV.ATSC.EHE. 2021-09-18T10:13:01.70 0.3 undecidable manual S 324 0.1988 152 0.24 72
IV.EL6.EHZ. 2021-09-18T10:13:01.82 0.3 undecidable manual S 70 0.1952 152 0.4 69
IV.SNTG.HNZ. 2021-09-18T10:13:00.29 0.1 undecidable manual S 98 0.0674 170 -0.14 100
IV.MML1.EHZ. 2021-09-18T10:13:00.94 0.3 undecidable manual S 149 0.1754 155 -0.27 72
IV.MMO1.HNZ. 2021-09-18T10:12:58.15 0.1 undecidable manual P 136 0.5045 121 0.19 90
IV.NRCA.HNZ. 2021-09-18T10:12:57.62 0.1 undecidable manual P 156 0.4721 124 0.05 93
IV.MC2.EHE. 2021-09-18T10:12:57.12 0.3 undecidable manual P 145 0.4317 127 0 71
IV.ATVO.HNE. 2021-09-18T10:12:56.75 0.1 undecidable manual P 290 0.3426 135 0.56 86
IV.MPAG.HNZ. 2021-09-18T10:12:56.62 0.1 undecidable manual P 350 0.3705 133 0.15 95
IV.ATLO.HNE. 2021-09-18T10:12:56.09 0.1 undecidable manual P 279 0.3247 137 0.06 97
IV.FDMO.HHZ. 2021-09-18T10:12:55.19 0.1 undecidable manual P 143 0.2869 141 -0.49 89
IV.CESI.HHE. 2021-09-18T10:12:55.12 0.1 undecidable manual P 171 0.2626 144 -0.35 93
IV.CSP1.EHZ. 2021-09-18T10:12:55.67 3.0 undecidable manual P 0
IV.MURB.HHZ. 2021-09-18T10:12:55.75 3.0 undecidable manual P 0
IV.ATFO.HNN. 2021-09-18T10:12:55.46 0.1 undecidable manual P 297 0.2257 148 0.27 95
IV.ATBU.HNZ. 2021-09-18T10:12:55.91 0.1 undecidable manual P 314 0.304 139 0.08 97
IV.FRON.EHN. 2021-09-18T10:12:55.32 0.1 undecidable manual P 341 0.2689 143 -0.2 94
IV.ATCC.HNZ. 2021-09-18T10:12:54.55 0.1 undecidable manual P 243 0.1718 155 -0.29 95
IV.SSFR.HHE. 2021-09-18T10:12:54.76 0.1 undecidable manual P 344 0.1781 155 -0.12 97
IV.ATSC.EHE. 2021-09-18T10:12:54.59 0.3 undecidable manual P 324 0.1988 152 -0.42 68
IV.MML1.EHZ. 2021-09-18T10:12:54.32 0.3 undecidable manual P 149 0.1754 155 -0.54 67
IV.EL6.EHZ. 2021-09-18T10:12:54.64 0.3 undecidable manual P 70 0.1952 152 -0.34 70
IV.SNTG.HNZ. 2021-09-18T10:12:53.98 0.1 undecidable manual P 98 0.0674 170 -0.43 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MURB.HHE. ML:1.4 5.085E-5 0.88 AML other m 2021-09-18T10:13:04.14
IV.MURB.HHN. ML:1.4 5.0058435E-5 2.24 AML other m 2021-09-18T10:13:03.90
IV.MML1.EHE. ML:0.8 1.7447265E-5 0.6016 AML other m 2021-09-18T10:13:01.32
IV.MML1.EHN. ML:0.8 1.7319035E-5 1.9776 AML other m 2021-09-18T10:13:01.42
IV.FDMO.HHE. ML:0.9 1.4184035E-5 1.2608 AML other m 2021-09-18T10:13:02.74
IV.FDMO.HHN. ML:1 1.893429E-5 0.2816 AML other m 2021-09-18T10:13:03.28
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