Earthquake with magnitude of ML 1.6 on date 08-12-2021 and time 07:37:34 (Italy) in region 1 km SE Preci (PG)

A magnitude ML 1.6 earthquake occured in region: 1 km SE Preci (PG), on

  • 08-12-2021 06:37:34 (UTC)
  • 08-12-2021 07:37:34 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.874, 13.043 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
Preci PG 1 724 724
Visso MC 7 1107 1831
Castelsantangelo sul Nera MC 9 281 2112
Sellano PG 10 1079 3191
Norcia PG 10 4957 8148
Ussita MC 11 444 8592
Cerreto di Spoleto PG 12 1075 9667
Monte Cavallo MC 14 145 9812
Cascia PG 17 3217 13029
Fiordimonte MC 19 202 13231
Vallo di Nera PG 19 364 13595
Pieve Torina MC 19 1458 15053
Poggiodomo PG 20 117 15170

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km E of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
59 Km W of Teramo (54892 inhabitants)
59 Km E of Perugia (166134 inhabitants)
65 Km NW of L'Aquila (69753 inhabitants)
91 Km SW of Ancona (100861 inhabitants)
92 Km NE of Viterbo (67173 inhabitants)
99 Km W of Montesilvano (53738 inhabitants)
101 Km N of Guidonia Montecelio (88673 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 1.6 2021-12-08
06:37:34
42.8742 13.0427 11 2021-12-08
06:43:02
Sala Sismica INGV-Roma 98276101
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-08 06:37:34 ± 0.03
Latitude 42.8742 ± 0.0018
Longitude 13.0427 ± 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 98276101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 224
Semi-minor axis of confidence ellipse (meter) 184
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 77
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) 90
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 25
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) 0.51351
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 18
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.4
Num. used stations 22
Type of magnitude ML
Reference to an origin 98276101
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-08 06:43:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SSFR.HHZ. 2021-12-08T06:37:46.61 3.0 undecidable manual P -0.27 0
IV.CING.HHZ. 2021-12-08T06:37:45.18 1.0 undecidable manual P 12 0.5135 50 0.07 23
IV.TERO.HHZ. 2021-12-08T06:37:44.65 1.0 positive manual P 121 0.4829 50 0.07 24
IV.CSP1.EHZ. 2021-12-08T06:37:44.77 0.1 undecidable manual S 29 0.2473 50 0.05 98
IV.EL6.EHZ. 2021-12-08T06:37:44.19 0.6 negative manual P 5 0.4569 50 0.05 47
IV.MMO1.EHZ. 2021-12-08T06:37:43.32 0.1 undecidable manual S 83 0.2095 50 -0.27 92
IV.GAVE.EHZ. 2021-12-08T06:37:43.52 0.1 undecidable manual S 211 0.2122 50 -0.14 95
IV.SNTG.HHZ. 2021-12-08T06:37:42.94 0.6 negative manual P 349 0.3876 50 -0.02 47
IV.MF5.EHZ. 2021-12-08T06:37:42.30 0.6 positive manual P 69 0.3256 50 0.4 45
IV.FDMO.HHZ. 2021-12-08T06:37:42.11 0.1 undecidable manual S 11 0.1655 50 -0.17 96
IV.RM33.EHZ. 2021-12-08T06:37:42.97 0.1 undecidable manual P 161 0.3858 50 0.04 95
IV.CESI.HHZ. 2021-12-08T06:37:42.22 0.1 undecidable manual S 322 0.1655 50 -0.05 99
IV.ASSB.HHZ. 2021-12-08T06:37:41.89 0.3 undecidable manual P 301 0.3274 50 -0.04 71
IV.GUMA.HHZ. 2021-12-08T06:37:41.33 1.0 positive manual P 49 0.2851 50 0.13 24
IV.CSP1.EHZ. 2021-12-08T06:37:40.54 0.1 positive manual P 29 0.2473 50 -0.03 97
IV.MML1.EHZ. 2021-12-08T06:37:40.61 0.3 undecidable manual P 348 0.2446 50 0.1 73
IV.MC2.EHZ. 2021-12-08T06:37:40.75 0.1 undecidable manual S 71 0.1133 131 0.06 99
IV.GAVE.EHZ. 2021-12-08T06:37:40.01 0.1 positive manual P 211 0.2122 50 0.06 99
IV.LNSS.HHZ. 2021-12-08T06:37:40.96 0.6 negative manual P 180 0.2716 50 0 48
IV.FDMO.HHZ. 2021-12-08T06:37:39.13 0.1 undecidable manual P 11 0.1655 50 -0.03 99
IV.CESI.HHZ. 2021-12-08T06:37:39.25 0.1 positive manual P 322 0.1655 50 0.1 99
IV.NRCA.HNZ. 2021-12-08T06:37:39.33 0.1 undecidable manual S 128 0.0665 146 -0.15 100
IV.MMO1.EHZ. 2021-12-08T06:37:39.83 0.6 undecidable manual P 83 0.2095 50 -0.08 48
IV.MC2.EHZ. 2021-12-08T06:37:38.43 0.1 positive manual P 71 0.1133 131 0.19 97
IT.MTCL.HGZ. 2021-12-08T06:37:38.50 0.3 positive manual P 345 0.1241 129 0.08 74
IV.NRCA.HNZ. 2021-12-08T06:37:37.64 0.1 negative manual P 128 0.0665 146 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.8 0.0009225 0.08 AML other m 2021-12-08T06:37:39.39
IV.NRCA.HNN. ML:1.8 0.000905 0.08 AML other m 2021-12-08T06:37:39.39
IV.NRCA.HNE. ML:1.8 0.000892 0.36 AML other m 2021-12-08T06:37:39.38
IV.NRCA.HHE. ML:1.8 0.000917 0.34 AML other m 2021-12-08T06:37:39.39
IT.MTCL.HGE. ML:3.6 0.0354 0.04 AML other m 2021-12-08T06:37:41.47
IT.MTCL.HGN. ML:3.3 0.0215 0.9 AML other m 2021-12-08T06:37:41.09
IV.FDMO.HHN. ML:1.2 0.000132 0.9 AML other m 2021-12-08T06:37:42.73
IV.MC2.EHN. ML:2 0.0009785 0.24 AML other m 2021-12-08T06:37:42.41
IV.FDMO.HHE. ML:1.4 0.0002025 0.4 AML other m 2021-12-08T06:37:42.49
IV.CESI.HHE. ML:1.2 0.0001264 0.24 AML other m 2021-12-08T06:37:42.63
IV.MC2.EHE. ML:1.7 0.0005065 0.68 AML other m 2021-12-08T06:37:42.77
IV.CESI.HHN. ML:1.2 0.0001208 1.28 AML other m 2021-12-08T06:37:43.81
IV.MMO1.EHN. ML:1.7 0.0002855 0.46 AML other m 2021-12-08T06:37:43.90
IV.MMO1.EHE. ML:1.6 0.0002255 0.12 AML other m 2021-12-08T06:37:43.68
IV.GAVE.EHN. ML:1.7 0.000336 0.2 AML other m 2021-12-08T06:37:44.14
IV.GAVE.EHE. ML:1.6 0.0002735 1 AML other m 2021-12-08T06:37:44.80
IV.MML1.EHN. ML:1.1 6.97E-5 1.82 AML other m 2021-12-08T06:37:45.94
IV.LNSS.HHE. ML:1.5 0.000147 1.86 AML other m 2021-12-08T06:37:46.99
IV.LNSS.HHN. ML:1.4 0.0001345 0.74 AML other m 2021-12-08T06:37:46.50
IV.MML1.EHE. ML:1 5.18E-5 1.22 AML other m 2021-12-08T06:37:46.82
IV.GUMA.HHE. ML:1.3 9.3E-5 0.42 AML other m 2021-12-08T06:37:48.15
IV.GUMA.HHN. ML:1.3 8.45E-5 1.08 AML other m 2021-12-08T06:37:49.30
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