Earthquake with magnitude of ML 1.6 on date 31-10-2021 and time 11:49:02 (UTC) in region Adriatico Centrale (MARE)

A magnitude ML 1.6 earthquake occured in region: Adriatico Centrale (MARE), on

  • 31-10-2021 11:49:02 (UTC)
  • 31-10-2021 12:49:02 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.296, 15.076 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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
72 Km NW of San Severo (53905 inhabitants)
73 Km E of Pescara (121014 inhabitants)
75 Km E of Chieti (51815 inhabitants)
80 Km E of Montesilvano (53738 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 2021-10-31
11:49:02
42.296 15.0757 10 2021-10-31
11:57:08
Sala Sismica INGV-Roma 97109971
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-31 11:49:02 ± 0.45
Latitude 42.2960 ± 0.0252
Longitude 15.0757 ± 0.0389
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97109971

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 3650
Semi-minor axis of confidence ellipse (meter) 2140
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 234
Circular confidence region, given by single value of horizontal uncertainty (meter) 3650
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 335
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.85076
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0
Num. used stations 2
Type of magnitude ML
Reference to an origin 97109971
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-31 11:57:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
NI.VINO.HHZ. 2021-10-31T11:50:54.62 3.0 undecidable manual Sn 2.9 0
IV.FREG.EHZ. 2021-10-31T11:50:52.87 3.0 undecidable manual Sn -0.01 0
IV.MOCL.EHZ. 2021-10-31T11:50:50.95 3.0 undecidable manual Sg 20.129999 0
IV.ISPIC.EHZ. 2021-10-31T11:50:35.66 3.0 negative manual Pg 13.99 0
IV.LADO.EHZ. 2021-10-31T11:50:30.42 3.0 undecidable manual Sn 0.01 0
IV.IMOL.HNZ. 2021-10-31T11:50:30.10 3.0 undecidable manual Sn 2.45 0
IV.FREG.EHZ. 2021-10-31T11:50:18.11 3.0 positive manual Pg 13.54 0
IV.MFNL.HHZ. 2021-10-31T11:50:16.49 3.0 positive manual Pn 4.66 0
AC.VLO.HHZ. 2021-10-31T11:50:12.28 3.0 undecidable manual Pg 13.83 0
IV.ASSB.HHZ. 2021-10-31T11:49:53.55 3.0 undecidable manual Sn -3.18 0
IV.MML1.EHZ. 2021-10-31T11:49:51.50 3.0 undecidable manual Sn -0.91 0
IV.SELL.HHZ. 2021-10-31T11:49:49.32 3.0 undecidable manual Pn -5.02 0
IV.MOMA.HHZ. 2021-10-31T11:49:36.16 3.0 negative manual Pg 3.35 0
IV.VVLD.HHZ. 2021-10-31T11:49:36.92 3.0 undecidable manual Sn -0.45 0
IV.CMIS.HHZ. 2021-10-31T11:49:32.16 3.0 positive manual Pg 2.96 0
IV.AMUR.HHZ. 2021-10-31T11:49:30.84 3.0 negative manual Pn -0.08 0
IV.VBKN.HHZ. 2021-10-31T11:49:30.57 3.0 negative manual Pg 3.37 0
IV.MSAG.HHZ. 2021-10-31T11:49:29.49 0.3 undecidable manual S 133 0.8508 50 -0.58 64
IV.SGRT.HHZ. 2021-10-31T11:49:26.61 0.3 undecidable manual S 137 0.7338 50 0.01 75
IV.MRVN.HHZ. 2021-10-31T11:49:26.40 3.0 undecidable manual Pn -0.26 0
OT.OT05.EHZ. 2021-10-31T11:49:26.89 0.1 undecidable manual S 148 0.7473 50 -0.1 98
OT.OT14.EHZ. 2021-10-31T11:49:26.78 0.6 undecidable manual S 123 0.7347 50 0.17 48
IV.APRC.HHZ. 2021-10-31T11:49:24.45 0.3 undecidable manual S 147 0.6403 50 0.62 66
IV.MSAG.HHZ. 2021-10-31T11:49:18.08 0.1 undecidable manual P 133 0.8508 50 -0.19 94
IV.INTR.HHZ. 2021-10-31T11:49:18.31 3.0 negative manual P -0.49 0
OT.OT05.EHZ. 2021-10-31T11:49:16.12 0.1 undecidable manual P 148 0.7473 50 -0.38 92
OT.OT14.EHZ. 2021-10-31T11:49:16.66 0.3 undecidable manual P 123 0.7347 50 0.38 69
IV.SGRT.HHZ. 2021-10-31T11:49:16.39 0.1 undecidable manual P 137 0.7338 50 0.12 98
IV.VCEL.EHZ. 2021-10-31T11:49:15.96 3.0 negative manual Pn -3.07 0
IV.LPEL.HHZ. 2021-10-31T11:49:15.52 3.0 positive manual P -0.42 0
IV.APRC.HHZ. 2021-10-31T11:49:14.79 0.1 undecidable manual P 147 0.6403 50 0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.APRC.HHE. ML:1.6 6.6E-5 0.78 AML other m 2021-10-31T11:49:25.71
IV.APRC.HHN. ML:1.6 6.98E-5 0.42 AML other m 2021-10-31T11:49:26.09
IV.VBKN.HHE. ML:3.3 0.0007695 0.08 AML other m 2021-10-31T11:49:32.12
IV.VBKN.HHN. ML:3.2 0.0007075 0.08 AML other m 2021-10-31T11:49:32.94
IV.MML1.EHN. ML:1.8 1.945E-5 0.42 AML other m 2021-10-31T11:49:49.46
IV.ASSB.HHE. ML:2.3 5.135E-5 0.06 AML other m 2021-10-31T11:49:58.72
IV.ASSB.HHN. ML:2.1 3.445E-5 0.4 AML other m 2021-10-31T11:49:58.75
IV.MML1.EHE. ML:2 2.805E-5 0.46 AML other m 2021-10-31T11:50:14.87
NI.VINO.HHN. ML:2.8 2.5E-5 0.42 AML other m 2021-10-31T11:50:20.32
IV.FREG.EHE. ML:3.8 0.0002135 1.56 AML other m 2021-10-31T11:51:00.19
IV.FREG.EHN. ML:3.6 0.000157 1.08 AML other m 2021-10-31T11:51:00.60
NI.VINO.HHE. ML:2.6 1.69E-5 0.42 AML other m 2021-10-31T11:51:05.07
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