Earthquake with magnitude of ML 0.4 on date 23-10-2021 and time 21:37:32 (Italy) in region 1 km W Costacciaro (PG)

A magnitude ML 0.4 earthquake occured in region: 1 km W Costacciaro (PG), on

  • 23-10-2021 19:37:32 (UTC)
  • 23-10-2021 21:37:32 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.36, 12.701 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Costacciaro PG 1 1216 1216
Sigillo PG 5 2404 3620
Scheggia e Pascelupo PG 6 1393 5013
Fossato di Vico PG 9 2840 7853
Gubbio PG 10 32216 40069
Cantiano PU 14 2245 42314
Sassoferrato AN 15 7285 49599
Serra Sant'Abbondio PU 16 1027 50626
Gualdo Tadino PG 16 15208 65834
Fabriano AN 17 31480 97314
Frontone PU 18 1300 98614

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km NE of Perugia (166134 inhabitants)
45 Km N of Foligno (57155 inhabitants)
60 Km SW of Fano (60888 inhabitants)
64 Km S of Pesaro (94582 inhabitants)
67 Km E of Arezzo (99543 inhabitants)
72 Km W of Ancona (100861 inhabitants)
79 Km S of Rimini (147750 inhabitants)
89 Km N of Terni (111501 inhabitants)
94 Km SE of Cesena (96758 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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 0.4 2021-10-23
19:37:32
43.3598 12.7013 12 2021-10-23
19:49:18
Sala Sismica INGV-Roma 96915501
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-23 19:37:32 ± 0.05
Latitude 43.3598 ± 0.0027
Longitude 12.7013 ± 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 96915501

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 320
Semi-minor axis of confidence ellipse (meter) 54
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 140
Circular confidence region, given by single value of horizontal uncertainty (meter) 320
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 94
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.06475
Epicentral distance of station farthest from the epicenter (degree) 0.2653
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitude information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.3
Num. used stations 9
Type of magnitude ML
Reference to an origin 96915501
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-23 19:49:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.NARO.HHZ. 2021-10-23T19:37:43.30 0.3 undecidable manual S 341 0.2653 95 -0.01 72
IV.ARVD.HHZ. 2021-10-23T19:37:42.10 0.3 undecidable manual S 52 0.2221 97 0.07 72
IV.PIEI.HHZ. 2021-10-23T19:37:41.65 0.3 undecidable manual S 326 0.2131 97 -0.11 71
IV.ATCC.EHZ. 2021-10-23T19:37:40.87 0.3 undecidable manual S 194 0.1799 101 0.08 72
IV.TB01.DHZ.01 2021-10-23T19:37:40.98 0.3 undecidable manual S 277 0.1943 99 -0.22 70
IV.ATBU.HNZ. 2021-10-23T19:37:40.62 0.3 undecidable manual S 316 0.1601 104 0.4 69
IV.FRON.EHZ. 2021-10-23T19:37:39.95 0.3 undecidable manual S 6 0.1592 104 -0.22 70
IV.NARO.HHZ. 2021-10-23T19:37:38.77 0.1 undecidable manual P 341 0.2653 95 -0.16 93
IV.SSFR.HHZ. 2021-10-23T19:37:38.50 0.3 undecidable manual S 38 0.0962 126 0.01 74
IV.FOSV.EHZ. 2021-10-23T19:37:38.00 0.3 undecidable manual S 146 0.0782 134 -0.08 75
IV.PIEI.HHZ. 2021-10-23T19:37:38.38 0.1 undecidable manual P 326 0.2131 97 0.34 91
IV.ATFO.HHZ. 2021-10-23T19:37:38.36 0.3 undecidable manual S 274 0.0944 127 -0.09 73
IV.ARVD.HHZ. 2021-10-23T19:37:38.23 0.1 undecidable manual P 52 0.2221 97 0.03 97
IV.ATBU.HNZ. 2021-10-23T19:37:37.29 0.1 undecidable manual P 316 0.1601 104 0.14 96
IV.ATCC.EHZ. 2021-10-23T19:37:37.46 0.1 undecidable manual P 194 0.1799 101 -0.02 98
IV.FRON.EHZ. 2021-10-23T19:37:37.01 0.3 undecidable manual P 6 0.1592 104 -0.12 72
IV.MURB.HNZ. 2021-10-23T19:37:37.17 0.3 undecidable manual P 233 0.161 104 0.01 73
IV.ATSC.EHZ. 2021-10-23T19:37:37.77 0.3 undecidable manual S 350 0.0648 141 -0.04 75
IV.TB01.DHZ.01 2021-10-23T19:37:37.60 0.1 undecidable manual P 277 0.1943 99 -0.12 95
IV.ATFO.HHZ. 2021-10-23T19:37:36.13 0.1 undecidable manual P 274 0.0944 127 0 100
IV.SSFR.HHZ. 2021-10-23T19:37:36.16 0.1 undecidable manual P 38 0.0962 126 0 99
IV.ATSC.EHZ. 2021-10-23T19:37:35.78 0.1 undecidable manual P 350 0.0648 141 0.02 100
IV.FOSV.EHZ. 2021-10-23T19:37:35.87 0.1 undecidable manual P 146 0.0782 134 -0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATFO.HHE. ML:0.8 7.5E-5 0.18 AML other m 2021-10-23T19:37:38.52
IV.ATFO.HHN. ML:0.7 5.205E-5 0.58 AML other m 2021-10-23T19:37:38.48
IV.FOSV.EHE. ML:0.3 2.61857005E-5 0.1152 AML other m 2021-10-23T19:37:38.05
IV.FOSV.EHN. ML:0.2 1.757217E-5 0.256 AML other m 2021-10-23T19:37:38.25
IV.ATCC.EHE. ML:0.5 2.2093805E-5 0.1152 AML other m 2021-10-23T19:37:41.20
IV.ATCC.EHN. ML:0.6 3.23078E-5 0.128 AML other m 2021-10-23T19:37:41.18
IV.ARVD.HHE. ML:0.2 1.026998366E-5 0.0768 AML other m 2021-10-23T19:37:42.64
IV.PIEI.HHE. ML:0.2 8.6290365E-6 0.0768 AML other m 2021-10-23T19:37:42.27
IV.PIEI.HHN. ML:-0.1 5.8832005E-6 0.0896 AML other m 2021-10-23T19:37:42.80
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