Earthquake with magnitude of ML 0.7 on date 18-10-2021 and time 01:46:26 (UTC) in region 6 km N Nocera Umbra (PG)

A magnitude ML 0.7 earthquake occured in region: 6 km N Nocera Umbra (PG), on

  • 18-10-2021 01:46:26 (UTC)
  • 18-10-2021 03:46:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.162, 12.799 at 11 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
Nocera Umbra PG 6 5839 5839
Gualdo Tadino PG 8 15208 21047
Fiuminata MC 11 1402 22449
Valtopina PG 12 1398 23847
Sefro MC 12 422 24269
Fossato di Vico PG 15 2840 27109
Pioraco MC 15 1134 28243
Esanatoglia MC 16 2034 30277
Valfabbrica PG 16 3389 33666
Serravalle di Chienti MC 16 1070 34736
Assisi PG 18 28299 63035
Sigillo PG 20 2404 65439

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km NE of Foligno (57155 inhabitants)
34 Km E of Perugia (166134 inhabitants)
68 Km N of Terni (111501 inhabitants)
77 Km SW of Ancona (100861 inhabitants)
78 Km S of Fano (60888 inhabitants)
82 Km E of Arezzo (99543 inhabitants)
84 Km S of Pesaro (94582 inhabitants)
93 Km NW of Teramo (54892 inhabitants)
100 Km NE of Viterbo (67173 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 0.7 2021-10-18
01:46:26
43.1618 12.7987 11 2021-10-18
02:06:13
Sala Sismica INGV-Roma 96707421
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-18 01:46:26 ± 0.04
Latitude 43.1618 ± 0.0018
Longitude 12.7987 ± 0.0025
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96707421

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 223
Semi-minor axis of confidence ellipse (meter) 97
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 14
Circular confidence region, given by single value of horizontal uncertainty (meter) 220
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 67
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.17537
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 10
Magnitude information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 96707421
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-18 02:06:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ASSB.HHZ. 2021-10-18T01:46:33.02 0.6 undecidable manual S 221 0.1565 121 -0.2 48
IV.CESI.HHZ. 2021-10-18T01:46:33.78 0.6 undecidable manual S 154 0.1754 119 -0.04 50
IV.CING.HHZ. 2021-10-18T01:46:33.83 3.0 undecidable manual P -0.03 0
IV.SNTG.HHZ. 2021-10-18T01:46:32.53 0.6 undecidable manual S 48 0.1394 125 -0.12 49
IV.CSP1.EHZ. 2021-10-18T01:46:32.86 0.6 positive manual P 0.03 0.76
IV.ATCC.EHZ. 2021-10-18T01:46:32.12 0.6 undecidable manual S 281 0.1178 129 0.13 49
IV.EL6.EHZ. 2021-10-18T01:46:32.41 0.6 negative manual P 0.05 0.76
IV.FOSV.EHZ. 2021-10-18T01:46:32.29 0.6 undecidable manual S 348 0.1358 125 -0.25 48
IV.MML1.EHZ. 2021-10-18T01:46:32.67 0.6 undecidable manual S 111 0.1349 125 0.15 49
IV.MURB.HHZ. 2021-10-18T01:46:31.48 0.3 negative manual P 0.05 1.14
IV.FDMO.HHZ. 2021-10-18T01:46:31.68 0.3 negative manual P -0.06 1.14
IV.ASSB.HHZ. 2021-10-18T01:46:30.20 0.1 positive manual P 221 0.1565 121 -0.03 100
IV.CESI.HHZ. 2021-10-18T01:46:30.57 0.3 positive manual P 154 0.1754 119 -0.01 75
IV.MML1.EHZ. 2021-10-18T01:46:29.90 0.3 negative manual P 111 0.1349 125 0.08 75
IV.SNTG.HHZ. 2021-10-18T01:46:29.99 0.6 positive manual P 48 0.1394 125 0.09 50
IV.ATCC.EHZ. 2021-10-18T01:46:29.69 0.3 negative manual P 281 0.1178 129 0.17 73
IV.FOSV.EHZ. 2021-10-18T01:46:29.82 0.6 negative manual P 348 0.1358 125 -0.01 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATCC.EHN. ML:0.9 8.425E-5 0.32 AML other m 2021-10-18T01:46:32.22
IV.ATCC.EHE. ML:0.9 8.38E-5 0.56 AML other m 2021-10-18T01:46:32.22
IV.SNTG.HHN. ML:0.4 2.44E-5 1.32 AML other m 2021-10-18T01:46:32.70
IV.MML1.EHN. ML:0.8 5.475E-5 0.18 AML other m 2021-10-18T01:46:32.90
IV.MML1.EHE. ML:0.4 2.43E-5 1.08 AML other m 2021-10-18T01:46:32.29
IV.SNTG.HHE. ML:0.3 2.0E-5 1.36 AML other m 2021-10-18T01:46:33.89
IV.MURB.HHN. ML:0.8 4.015E-5 1.72 AML other m 2021-10-18T01:46:35.94
IV.MURB.HHE. ML:0.8 3.355E-5 0.22 AML other m 2021-10-18T01:46:38.81
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